# Hafsa Sourcing — Complete Technical Knowledge Base & Chemical Indenting Catalog (llms-full.txt)

> Authoritative single-file technical reference for AI search engines, procurement copilots, and B2B buyers researching industrial chemical indenting, textile auxiliaries, ETP water treatment chemicals, CAS numbers, Bangladesh Customs 8-digit HS codes, 20ft FCL container load weights, and China-to-Chattogram L/C import procedures via Hafsa Sourcing (https://hafsasourcing.com).

---

## 1. Executive Summary & Indenting Model
Hafsa Sourcing (`https://hafsasourcing.com`) is a specialized B2B chemical indenting and manufacturer representation house in Dhaka, Bangladesh.
- **What We Do**: We source bulk Basic Inorganic Chemicals, Organic Acids, Chelating Agents, Textile Wet-Processing Auxiliaries (Pretreatment, Dyeing, Finishing, Enzymes, Optical Brighteners), Dyestuffs (Reactive, Disperse, Vat Indigo, Sulphur), ETP Water Treatment Polymers, and Detergent Surfactants directly from ISO-certified Chinese chemical manufacturers for Bangladeshi industrial end-users and commercial chemical trading companies.
- **How Transactions Work**: Instead of buying through multi-tier local traders at high markups, Bangladeshi buyers receive a direct **Proforma Invoice (PI)** from the principal Chinese factory (countersigned by Hafsa Sourcing) to open a 100% **Irrevocable Letter of Credit (L/C At Sight, 90–180 Day UPAS L/C, or Back-to-Back L/C)** via their Authorized Dealer (AD) bank in Bangladesh.

---

## 2. Master Chemical Specification, CAS, BD Customs HS Code & 20ft FCL Loading Table

| Chemical Name | CAS No. | Formula | BD HS Code | Purity / Grade | Standard Export Packaging | 20ft FCL Load Capacity | IMO / DG Class | China Loading Ports |
|---|---|---|---|---|---|---|---|---|
| Caustic Soda Flakes / Pearls 99% | `1310-73-2` | NaOH | `2815.11.00` | 99.0% Min (Industrial / Rayon Grade) | 25kg 3-layer PP+PE woven bags (with inner liner) | 27.0 MT (Unpalletized) / 24.0 MT (Palletized) | IMO Class 8 (Corrosive), UN 1823 | Qingdao Port, Tianjin (Xingang) Port |
| Hydrogen Peroxide 50% (Textile & Industrial Grade) | `7722-84-1` | H2O2 | `2847.00.00` | 50.0% Min w/w (High Stability ≥ 97%) | 30kg / 35kg / 50kg Vented Blue HDPE Drums or 1,200kg IBC Totes | 21.0 MT (600 × 35kg Drums) / 24.0 MT (20 × 1200kg IBCs) | IMO Class 5.1 (Oxidizer) + Sub-risk Class 8, UN 2014 | Qingdao Port, Shanghai Port, Ningbo Port |
| Soda Ash Light & Dense 99.2% | `497-19-8` | Na2CO3 | `2836.20.00` | 99.2% Min Total Alkali (Light & Dense Grades) | Light: 40kg/50kg PP Bags; Dense: 25kg/50kg/1000kg Jumbo Bags | Light: 21.0–22.0 MT | Dense: 25.0–27.0 MT per 20ft FCL | Non-Hazardous / Non-DG Cargo | Qingdao Port, Tianjin Port, Lianyungang Port |
| Sodium Sulphate Anhydrous 99% (Glauber's Salt) | `7757-82-6` | Na2SO4 | `2833.11.00` | 99.0% Min (Neutral pH 6–8 & Weak Alkaline pH 9–11) | 50kg PP Woven Bags (or 25kg / 1000kg Jumbo Bags) | 27.0 – 28.0 MT (540–560 × 50kg Bags per 20ft FCL) | Non-Hazardous / Non-DG Cargo | Qingdao Port, Shanghai Port, Chongqing / Wuhan via Shanghai |
| Sodium Hydrosulphite 88% / 90% (Hydrose) | `7775-14-6` | Na2S2O4 | `2831.10.00` | 88.0% Min & 90.0% Min (Sodium Formate Process) | 50kg New Sealed Iron Drums with Double PE Inner Liners | 20.0 – 22.0 MT (400–440 × 50kg Iron Drums per 20ft FCL) | IMO Class 4.2 (Spontaneously Combustible Solid), UN 1384 | Guangzhou (Huangpu) Port, Qingdao Port, Shanghai Port |
| Sodium Metabisulphite 97% (SMBS) | `7681-57-4` | Na2S2O5 | `2832.10.00` | 97.0% Min (SO2 ≥ 65.0%, Tech & Food Grades) | 25kg PP Woven Bags with PE Inner Liner | 25.0 – 27.0 MT (1,000–1,080 × 25kg Bags per 20ft FCL) | Non-DG Cargo (Keep dry & away from strong acids) | Qingdao Port, Changsha / Shanghai Port |
| Sodium Bicarbonate 99.5% (Tech, Feed & Food Grade) | `144-55-8` | NaHCO3 | `2836.30.00` | 99.0% – 99.5% Min | 25kg PP+PE Woven or Multi-Wall Kraft Bags | 25.0 – 27.0 MT (1,000–1,080 × 25kg Bags per 20ft FCL) | Non-Hazardous / Non-DG Cargo | Qingdao Port, Tianjin Port |
| Glacial Acetic Acid 99.85% (GAA) | `64-19-7` | CH3COOH | `2915.21.00` | 99.85% Min (Virgin Industrial & Textile Grade) | 30kg / 35kg / 215kg HDPE Drums or 1,050kg IBC Totes | 21.0 MT (600 × 35kg Drums or 20 × 1050kg IBCs per 20ft FCL) | IMO Class 8 (Corrosive) + Sub-risk Class 3 (Flammable), UN 2789 | Qingdao Port, Shanghai Port, Nanjing / Ningbo Port |
| Formic Acid 85% & 90% | `64-18-6` | HCOOH | `2915.11.00` | 85.0% Min & 90.0% Min (First Grade) | 25kg / 35kg / 250kg HDPE Drums or 1,200kg IBC Totes | 22.4 – 25.0 MT (Drums) / 24.0 MT (20 × 1200kg IBCs) | IMO Class 8 (Corrosive) + Sub-risk Class 3, UN 1779 | Qingdao Port, Tianjin Port |
| Oxalic Acid 99.6% (Refined Industrial Grade) | `6153-56-6` | C2H2O4·2H2O | `2917.11.00` | 99.6% Min (Refined White Crystal) | 25kg PP Woven Bags with Inner PE Liner | 25.0 – 27.0 MT (1,000–1,080 × 25kg Bags per 20ft FCL) | IMO Class 8, UN 3260 (or Non-DG per carrier schedule) | Qingdao Port, Tianjin Port, Xiamen Port |
| Citric Acid Monohydrate & Anhydrous (99.5%–100.5%) | `5949-29-1` | C6H8O7·H2O | `2918.14.00` | 99.5% – 100.5% (BP / USP / FCC / Industrial Grade) | 25kg Multi-Wall Kraft Paper-Plastic Composite or PP Bags | 25.0 MT (Unpalletized) / 20.0 MT (Palletized) per 20ft FCL | Non-Hazardous / Non-DG Cargo | Qingdao Port, Lianyungang Port |
| Sodium Gluconate 99% (High-Alkali Chelating Grade) | `527-07-1` | C6H11NaO7 | `2918.16.00` | 99.0% Min (White Crystalline Powder) | 25kg PP Woven or Kraft Paper Bags with PE Liner | 25.0 – 26.0 MT (1,000–1,040 × 25kg Bags per 20ft FCL) | Non-Hazardous / Non-DG Cargo | Qingdao Port, Tianjin Port |
| STPP 94% & SHMP 68% (Industrial & Water Softening Phosphates) | `7758-29-4` | Na5P3O10 / (NaPO3)6 | `2835.31.00` | STPP: 94.0% Min (P2O5 ≥ 57%) | SHMP: 68.0% Min Total P2O5 | 25kg PP Woven Bags with Double PE Inner Liner | 25.0 – 27.0 MT (1,000–1,080 × 25kg Bags per 20ft FCL) | Non-Hazardous / Non-DG Cargo | Chongqing / Shanghai Port, Fangchenggang / Qinzhou Port |
| Wetting, Scouring & Mercerizing Agents (APEO/NPEO-Free) | `68439-50-9` | RO(CH2CH2O)nH | `3402.90.00` | 99% Conc. Base (AEO-7/9) & 1:4 High-Conc. Formulated Blends | 125kg / 200kg HDPE Drums or 1,000kg IBC Totes | 19.2 – 20.0 MT (Drums / 20 × 1000kg IBCs per 20ft FCL) | Non-DG Cargo | Shanghai Port, Ningbo Port, Guangzhou Port |
| Formaldehyde-Free Fixing, Leveling, Soaping & Peroxide Stabilizer Concentrates | `26062-79-3` | Polymeric Condensate | `3809.91.00` | 60% – 75% High-Concentration Mother Liquor (1:3 to 1:5 Dilution) | 125kg / 200kg HDPE Drums or 1,000kg IBC Totes | 20.0 MT (100 × 200kg Drums or 20 × 1000kg IBCs per 20ft FCL) | Non-Hazardous / Non-DG Cargo | Shanghai Port, Ningbo Port, Qingdao Port |
| Hydrophilic Block Silicone Oil (70–100%) & Cationic Softener Flakes (100%) | `68554-65-4` | R-Si(CH3)2-O-[Si(R)(CH3)O]n | `3910.00.00` | Silicone Crude Oil: 70%–100% Active | Softener Flakes: 100% Solid Active | Silicone Oil: 120kg/200kg Drums | Softener Flakes: 25kg PP Woven Bags | Silicone Oil: 19.2 MT (Drums) | Softener Flakes: 17.5–20.0 MT (25kg Bags) | Non-Hazardous / Non-DG Cargo | Shanghai Port, Ningbo Port, Huangpu Port |
| Textile Enzymes (Bio-Polishing Cellulase, Peroxide-Killer Catalase & Amylase) | `9012-54-8` | Enzymatic Protein Complex | `3507.90.00` | High-Activity Crude Concentrates (Catalase: 50k–200k U/mL | Cellulase: 10k–50k NCU/g) | 25kg / 30kg HDPE Jerrycans or 200kg HDPE Drums (Liquid) & 25kg Fiber Drums (Granular) | 18.0 – 20.0 MT (Drums / Jerrycans per 20ft FCL) | Non-Hazardous / Non-DG Cargo | Qingdao Port, Shanghai Port, Tianjin Port |
| Optical Brightening Agents — OBA (4BM / BA-L, BBU, VBL, CXT & OB-1) | `12768-92-2` | C40H40N12O8S2Na2 | `3204.20.00` | 100% / 200% / 300% Export Standard UV E-Value Strength (Liquid & Powder) | 25kg Fiber Drums with Double PE Liners (Powder) or 200kg/1000kg IBC (Liquid BA-L) | 14.0 – 16.0 MT (Fiber Drums) / 20.0 MT (Liquid IBCs) per 20ft FCL | Non-Hazardous / Non-DG Cargo | Qingdao Port, Shanghai Port, Tianjin Port |
| Reactive Dyes (VS/MCT), Disperse Dyes & Vat Indigo Granular 94% | `17095-24-8` | Synthetic Chromophore Series | `3204.16.00` | 100% / 133% / 150% / 300% Export Standard Strength (Salt-Free / Low-PCA) | 25kg Iron Drums, Fiber Drums, or Heavy-Duty Export Cartons with Double PE Bags | 14.0 – 18.0 MT (Palletized Cartons / Drums per 20ft FCL) | Non-DG Cargo | Shanghai Port, Ningbo Port, Qingdao Port |
| PAC (Poly Aluminium Chloride) 28%–30% Spray-Dried | `1327-41-9` | [Al2(OH)nCl6-n]m | `2827.32.00` | 28.0% – 30.0% Min Al2O3 (Spray-Dried Golden Yellow / Light Yellow Powder) | 25kg PP Woven Bags with Inner PE Liner | 25.0 – 26.0 MT (1,000–1,040 × 25kg Bags per 20ft FCL) | Non-DG Cargo (or Class 8 in select carriers) | Qingdao Port, Tianjin Port |
| Textile ETP Decolorizing Agent (CW-08 / Dicyandiamide Resin 50%) | `55295-98-2` | (C3H8N4O)n | `3909.39.00` | 50.0% ± 2.0% Solid Content (High Cationic Charge Density) | 30kg / 250kg HDPE Drums or 1,250kg IBC Totes | 20.0 MT (80 × 250kg Drums) / 22.5 MT (18 × 1250kg IBCs per 20ft FCL) | Non-Hazardous / Non-DG Cargo | Shanghai Port, Qingdao Port, Nanjing Port |
| PAM (Polyacrylamide — Anionic APAM & Cationic CPAM Flocculant) | `9003-05-8` | (C3H5NO)n | `3906.90.00` | Solid Content ≥ 89.0% (APAM MW: 12–22 Million Da | CPAM Ionicity: 20%–60%) | 25kg Multi-Wall Kraft Paper or PP Bags with Moisture-Proof PE Liner | 20.0 – 22.0 MT (800–880 × 25kg Bags per 20ft FCL) | Non-Hazardous / Non-DG Cargo | Qingdao Port, Shanghai Port |
| Ferrous Sulphate Heptahydrate 98% (ETP & Industrial Grade) | `7782-63-0` | FeSO4·7H2O | `2833.29.00` | 98.0% Min (Fe2+ ≥ 19.7%, Dry Centrifuge Refined) | 25kg or 50kg PP Woven Bags with PE Liner | 27.0 MT (1,080 × 25kg or 540 × 50kg Bags per 20ft FCL) | Non-Hazardous / Non-DG Cargo | Qingdao Port, Fangchenggang Port, Nanjing Port |
| Calcium Hypochlorite 65% / 70% (Sodium Process Granular) | `7778-54-3` | Ca(ClO)2 | `2828.10.00` | 65.0% Min & 70.0% Min Effective Chlorine (Low Insolubles Sodium Process) | 40kg / 45kg / 50kg UN-Approved Plastic Drums | 21.6 MT (480 × 45kg Drums per 20ft DG FCL) | IMO Class 5.1 (Oxidizing Substance), UN 2880 / UN 1748 | Wuhan / Shanghai Port, Qingdao Port |
| Sodium Formate 95%–97% (Leather Tanning & Dyeing Buffer Grade) | `141-53-7` | HCOONa | `2915.12.00` | 95.0% Min & 97.0% Min (White Crystalline Powder) | 25kg PP Woven Bags with PE Inner Liner (or 1,000kg Jumbo Bags) | 25.0 – 27.0 MT (1,000–1,080 × 25kg Bags per 20ft FCL) | Non-Hazardous / Non-DG Cargo | Qingdao Port, Tianjin Port |
| SLES 70% (Sodium Lauryl Ether Sulfate) & LABSA 96% | `68585-34-2` | RO(CH2CH2O)nSO3Na / R-C6H4-SO3H | `3402.31.00` | SLES: 70.0% ± 2.0% Active | LABSA: 96.0% Min Active | SLES: 170kg/220kg Open-Top Drums | LABSA: 215kg HDPE Drums or 1,050kg IBCs | SLES: 19.38 MT (114 × 170kg Drums) | LABSA: 17.2–21.0 MT per 20ft FCL | SLES: Non-DG | LABSA: IMO Class 8 (Corrosive), UN 2586 | Shanghai Port, Ningbo Port, Nanjing Port, Qingdao Port |
| Titanium Dioxide (TiO2) Rutile (R-996 / BLR-699) & Anatase (A-101) | `13463-67-7` | TiO2 | `3206.11.00` | Rutile (Zr/Al Surface Treated ≥ 94%–98%) & Anatase (≥ 98.5%) | 25kg Multi-Wall Valve Paper Bags (Palletized & Stretch-Wrapped) | 22.0 – 25.0 MT (Palletized 25kg Bags per 20ft FCL) | Non-Hazardous / Non-DG Cargo | Qingdao Port, Shanghai Port, Chongqing / Fangchenggang |

---

## 3. Detailed Chemical Profiles & Typical COA Specifications

### Caustic Soda Flakes / Pearls 99% (Sodium Hydroxide)
- **Canonical URL**: https://hafsasourcing.com/chemicals/caustic-soda-flakes-pearls-99
- **SKU**: HS-NAOH-99 | **CAS Number**: `1310-73-2` | **EC Number**: `215-185-5` | **Formula**: `NaOH`
- **Bangladesh Customs 8-Digit HS Code**: `2815.11.00`
- **Category**: Basic Inorganic & Alkalis
- **Standard Purity / Grade**: 99.0% Min (Industrial / Rayon Grade) (GB/T 209-2018 (IT-I))
- **Chinese Origin & Loading Ports**: Shandong / Inner Mongolia / Hebei, China (Qingdao Port, Tianjin (Xingang) Port)
- **Standard Export Packaging**: 25kg 3-layer PP+PE woven bags (with inner liner)
- **20ft FCL Container Load Capacity**: 27.0 MT (Unpalletized) / 24.0 MT (Palletized)
- **IMO / Hazmat Classification**: IMO Class 8 (Corrosive), UN 1823
- **Bangladesh Customs & Regulatory Note**: Standard Industrial or Commercial IRC; HS Code 2815.11.00 mandatory on B/L & PI.
- **Primary Applications in Bangladesh**: Cotton knit and woven fabric scouring, kier boiling, and high-luster mercerizing; Alkali fixation bath in reactive dyeing and vat/indigo dye reduction; pH neutralization of acidic wastewater streams in factory Effluent Treatment Plants (ETP); Saponification base for soap, detergent, and sodium silicate manufacturing
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Sodium Hydroxide (NaOH) Assay**: Spec `≥ 99.0%` (Typical: `99.3%`, Method: GB/T 4348.1)
  - **Sodium Carbonate (Na2CO3)**: Spec `≤ 0.40%` (Typical: `0.21%`, Method: GB/T 4348.1)
  - **Sodium Chloride (NaCl)**: Spec `≤ 0.03%` (Typical: `0.018%`, Method: GB/T 4348.2)
  - **Ferric Oxide (Fe2O3)**: Spec `≤ 0.005% (50 ppm)` (Typical: `0.002% (20 ppm)`, Method: GB/T 4348.3)
  - **Appearance**: Spec `White Dry Flakes / Pearls` (Typical: `Complies`, Method: Visual)

### Hydrogen Peroxide 50% (Textile & Industrial Grade) (Hydrogen Peroxide Aqueous Solution)
- **Canonical URL**: https://hafsasourcing.com/chemicals/hydrogen-peroxide-50-percent
- **SKU**: HS-H2O2-50 | **CAS Number**: `7722-84-1` | **EC Number**: `231-765-0` | **Formula**: `H2O2`
- **Bangladesh Customs 8-Digit HS Code**: `2847.00.00`
- **Category**: Basic Inorganic & Alkalis
- **Standard Purity / Grade**: 50.0% Min w/w (High Stability ≥ 97%) (GB/T 1616-2014)
- **Chinese Origin & Loading Ports**: Shandong / Zhejiang / Jiangsu, China (Qingdao Port, Shanghai Port, Ningbo Port)
- **Standard Export Packaging**: 30kg / 35kg / 50kg Vented Blue HDPE Drums or 1,200kg IBC Totes
- **20ft FCL Container Load Capacity**: 21.0 MT (600 × 35kg Drums) / 24.0 MT (20 × 1200kg IBCs)
- **IMO / Hazmat Classification**: IMO Class 5.1 (Oxidizer) + Sub-risk Class 8, UN 2014
- **Bangladesh Customs & Regulatory Note**: Requires Bangladesh Department of Explosives (DoEX) import/storage license & CPA DG direct-delivery compliance.
- **Primary Applications in Bangladesh**: Continuous pad-steam and exhaust bleaching of cotton yarn, knit, and woven grey fabrics; Denim garment washing and oxidative desizing in washing plants; De-inking and pulp bleaching in paper and board mills; Advanced Fenton oxidation and COD/BOD reduction in industrial ETPs
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Hydrogen Peroxide (H2O2) Content**: Spec `≥ 50.0% (w/w)` (Typical: `50.25%`, Method: GB/T 1616-2014)
  - **Acidity (as H2SO4)**: Spec `≤ 0.03%` (Typical: `0.015%`, Method: GB/T 1616-2014)
  - **Stability (100°C, 16 hrs)**: Spec `≥ 97.0%` (Typical: `98.4%`, Method: GB/T 1616-2014)
  - **Non-Volatile Matter (Evaporation Residue)**: Spec `≤ 0.08%` (Typical: `0.04%`, Method: GB/T 1616-2014)
  - **Freezing Point**: Spec `-52°C Approx.` (Typical: `-52°C`, Method: Standard)

### Soda Ash Light & Dense 99.2% (Sodium Carbonate Anhydrous)
- **Canonical URL**: https://hafsasourcing.com/chemicals/soda-ash-light-dense-99-2
- **SKU**: HS-NA2CO3-99 | **CAS Number**: `497-19-8` | **EC Number**: `207-838-8` | **Formula**: `Na2CO3`
- **Bangladesh Customs 8-Digit HS Code**: `2836.20.00`
- **Category**: Basic Inorganic & Alkalis
- **Standard Purity / Grade**: 99.2% Min Total Alkali (Light & Dense Grades) (GB/T 210.1-2004 (II-Class))
- **Chinese Origin & Loading Ports**: Shandong / Henan / Qinghai / Jiangsu, China (Qingdao Port, Tianjin Port, Lianyungang Port)
- **Standard Export Packaging**: Light: 40kg/50kg PP Bags; Dense: 25kg/50kg/1000kg Jumbo Bags
- **20ft FCL Container Load Capacity**: Light: 21.0–22.0 MT | Dense: 25.0–27.0 MT per 20ft FCL
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Non-DG fast-track port clearance at Chattogram Port & Kamalapur ICD under HS 2836.20.00.
- **Primary Applications in Bangladesh**: Soda Ash Light: Primary alkali buffer for fixing cotton reactive dyes in exhaust and continuous dyeing; Soda Ash Dense: Fluxing raw material for float glass, hollow glassware, and sodium silicate plants; Dry builder and alkalinity booster in detergent powder and laundry bar production; Process water softening and boiler feed water conditioning
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Total Alkali (as Na2CO3 dry basis)**: Spec `≥ 99.2%` (Typical: `99.4%`, Method: GB/T 210.2)
  - **Chloride (as NaCl)**: Spec `≤ 0.70%` (Typical: `0.35%`, Method: GB/T 210.2)
  - **Iron (Fe) Content**: Spec `≤ 0.004%` (Typical: `0.002%`, Method: GB/T 210.2)
  - **Water Insoluble Matter**: Spec `≤ 0.03%` (Typical: `0.015%`, Method: GB/T 210.2)
  - **Bulk Density**: Spec `Light: 0.50–0.65 g/ml | Dense: ≥ 0.90 g/ml` (Typical: `0.58 / 0.98 g/ml`, Method: GB/T 210.2)

### Sodium Sulphate Anhydrous 99% (Glauber's Salt) (Disodium Sulphate Anhydrous)
- **Canonical URL**: https://hafsasourcing.com/chemicals/sodium-sulphate-anhydrous-99
- **SKU**: HS-NA2SO4-99 | **CAS Number**: `7757-82-6` | **EC Number**: `231-820-9` | **Formula**: `Na2SO4`
- **Bangladesh Customs 8-Digit HS Code**: `2833.11.00`
- **Category**: Basic Inorganic & Alkalis
- **Standard Purity / Grade**: 99.0% Min (Neutral pH 6–8 & Weak Alkaline pH 9–11) (GB/T 6009-2014 (Class I))
- **Chinese Origin & Loading Ports**: Sichuan / Hunan / Jiangsu, China (Qingdao Port, Shanghai Port, Chongqing / Wuhan via Shanghai)
- **Standard Export Packaging**: 50kg PP Woven Bags (or 25kg / 1000kg Jumbo Bags)
- **20ft FCL Container Load Capacity**: 27.0 – 28.0 MT (540–560 × 50kg Bags per 20ft FCL)
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Non-DG cargo; eligible for maximum 27–28 MT heavy 20ft container loading from Sichuan/Jiangsu rock-salt mines.
- **Primary Applications in Bangladesh**: Electrolyte exhausting agent in cotton reactive, direct, and sulphur dyeing baths; Free-flowing carrier and ionic strength builder in synthetic laundry detergent powders; Fining agent to remove micro-bubbles in molten glass and kraft pulp cooking liquor makeup
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Sodium Sulphate (Na2SO4) Assay**: Spec `≥ 99.0%` (Typical: `99.35%`, Method: GB/T 6009-2014)
  - **Calcium & Magnesium (as Mg)**: Spec `≤ 0.15%` (Typical: `0.06%`, Method: GB/T 6009-2014)
  - **Iron (Fe) Content**: Spec `≤ 0.002%` (Typical: `0.0008%`, Method: GB/T 6009-2014)
  - **Moisture Content**: Spec `≤ 0.20%` (Typical: `0.08%`, Method: GB/T 6009-2014)
  - **Whiteness (R457)**: Spec `≥ 85.0%` (Typical: `88.5%`, Method: GB/T 6009-2014)

### Sodium Hydrosulphite 88% / 90% (Hydrose) (Sodium Dithionite)
- **Canonical URL**: https://hafsasourcing.com/chemicals/sodium-hydrosulphite-hydrose-88-90
- **SKU**: HS-NA2S2O4-88 | **CAS Number**: `7775-14-6` | **EC Number**: `231-890-0` | **Formula**: `Na2S2O4`
- **Bangladesh Customs 8-Digit HS Code**: `2831.10.00`
- **Category**: Basic Inorganic & Alkalis
- **Standard Purity / Grade**: 88.0% Min & 90.0% Min (Sodium Formate Process) (HG/T 2074-2011)
- **Chinese Origin & Loading Ports**: Guangdong / Shandong / Hubei, China (Guangzhou (Huangpu) Port, Qingdao Port, Shanghai Port)
- **Standard Export Packaging**: 50kg New Sealed Iron Drums with Double PE Inner Liners
- **20ft FCL Container Load Capacity**: 20.0 – 22.0 MT (400–440 × 50kg Iron Drums per 20ft FCL)
- **IMO / Hazmat Classification**: IMO Class 4.2 (Spontaneously Combustible Solid), UN 1384
- **Bangladesh Customs & Regulatory Note**: Strict CPA DG Yard & DoEX clearance rules apply at Chattogram Port; shipped exclusively in UN-approved 50kg steel drums.
- **Primary Applications in Bangladesh**: Reduction of Vat Indigo and Vat dyes into water-soluble leuco form for denim and workwear; Reduction clearing after polyester disperse dyeing to achieve high rub and wash fastness; Stripping of faulty dyed fabrics and reductive bleaching of mechanical pulp and kaolin clay
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Sodium Hydrosulphite (Na2S2O4)**: Spec `≥ 88.0% / ≥ 90.0%` (Typical: `88.6% / 90.4%`, Method: HG/T 2074-2011)
  - **Insoluble Matter in Water**: Spec `≤ 0.05%` (Typical: `0.02%`, Method: HG/T 2074-2011)
  - **Iron (Fe) Content**: Spec `≤ 20 ppm` (Typical: `11 ppm`, Method: HG/T 2074-2011)
  - **Heavy Metals (as Pb)**: Spec `≤ 10 ppm (Zinc-Free)` (Typical: `< 5 ppm`, Method: HG/T 2074-2011)

### Sodium Metabisulphite 97% (SMBS) (Disodium Disulphite / Sodium Pyrosulphite)
- **Canonical URL**: https://hafsasourcing.com/chemicals/sodium-metabisulphite-smbs-97
- **SKU**: HS-SMBS-97 | **CAS Number**: `7681-57-4` | **EC Number**: `231-673-0` | **Formula**: `Na2S2O5`
- **Bangladesh Customs 8-Digit HS Code**: `2832.10.00`
- **Category**: Basic Inorganic & Alkalis
- **Standard Purity / Grade**: 97.0% Min (SO2 ≥ 65.0%, Tech & Food Grades) (HG/T 2826-2008 / GB 1886.7-2015)
- **Chinese Origin & Loading Ports**: Shandong / Hunan, China (Qingdao Port, Changsha / Shanghai Port)
- **Standard Export Packaging**: 25kg PP Woven Bags with PE Inner Liner
- **20ft FCL Container Load Capacity**: 25.0 – 27.0 MT (1,000–1,080 × 25kg Bags per 20ft FCL)
- **IMO / Hazmat Classification**: Non-DG Cargo (Keep dry & away from strong acids)
- **Bangladesh Customs & Regulatory Note**: Classified under HS Code 2832.10.00; specify Industrial vs Food Grade on PI.
- **Primary Applications in Bangladesh**: Anti-chlor neutralization after sodium/calcium hypochlorite bleaching in denim washing plants; Dechlorination of feed water for Reverse Osmosis (RO) membranes in industrial WTPs; Reduction of toxic Cr(VI) to Cr(III) in tannery and electroplating effluent treatment; Preservative and antioxidant in leather pickling and specialty processing
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Sodium Metabisulphite (Na2S2O5)**: Spec `≥ 97.0%` (Typical: `97.6%`, Method: HG/T 2826-2008)
  - **Sulphur Dioxide (SO2) Equivalent**: Spec `≥ 65.0%` (Typical: `65.7%`, Method: HG/T 2826-2008)
  - **Water Insoluble Matter**: Spec `≤ 0.05%` (Typical: `0.02%`, Method: HG/T 2826-2008)
  - **Iron (Fe) Content**: Spec `≤ 0.005%` (Typical: `0.002%`, Method: HG/T 2826-2008)
  - **pH Value (1% Aqueous Solution)**: Spec `4.0 – 4.6` (Typical: `4.3`, Method: HG/T 2826-2008)

### Sodium Bicarbonate 99.5% (Tech, Feed & Food Grade) (Sodium Hydrogen Carbonate)
- **Canonical URL**: https://hafsasourcing.com/chemicals/sodium-bicarbonate-99-5
- **SKU**: HS-NAHCO3-99 | **CAS Number**: `144-55-8` | **EC Number**: `205-633-8` | **Formula**: `NaHCO3`
- **Bangladesh Customs 8-Digit HS Code**: `2836.30.00`
- **Category**: Basic Inorganic & Alkalis
- **Standard Purity / Grade**: 99.0% – 99.5% Min (GB/T 1606-2008 / GB 1886.2-2015)
- **Chinese Origin & Loading Ports**: Inner Mongolia / Shandong / Henan, China (Qingdao Port, Tianjin Port)
- **Standard Export Packaging**: 25kg PP+PE Woven or Multi-Wall Kraft Bags
- **20ft FCL Container Load Capacity**: 25.0 – 27.0 MT (1,000–1,080 × 25kg Bags per 20ft FCL)
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Non-DG cargo under HS Code 2836.30.00; Food/Feed grade requires COA & Health/Sanitary Cert if imported for feed/food.
- **Primary Applications in Bangladesh**: Mild alkali donor in reactive dye printing pastes for cotton and viscose fabrics; Uniform pH neutralization of chrome-tanned leather (wet blue) in Savar tanneries; Flue-gas desulfurization, fire extinguisher dry powder, and detergent formulation
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Total Alkali (as NaHCO3)**: Spec `≥ 99.0% – 100.5%` (Typical: `99.6%`, Method: GB/T 1606-2008)
  - **Loss on Drying (Moisture)**: Spec `≤ 0.20%` (Typical: `0.07%`, Method: GB/T 1606-2008)
  - **pH (10 g/L Solution)**: Spec `≤ 8.6` (Typical: `8.3`, Method: GB/T 1606-2008)
  - **Chloride (as NaCl)**: Spec `≤ 0.40%` (Typical: `0.12%`, Method: GB/T 1606-2008)

### Glacial Acetic Acid 99.85% (GAA) (Ethanoic Acid (Glacial))
- **Canonical URL**: https://hafsasourcing.com/chemicals/glacial-acetic-acid-99-85
- **SKU**: HS-GAA-9985 | **CAS Number**: `64-19-7` | **EC Number**: `200-580-7` | **Formula**: `CH3COOH`
- **Bangladesh Customs 8-Digit HS Code**: `2915.21.00`
- **Category**: Organic Acids, Chelates & Phosphates
- **Standard Purity / Grade**: 99.85% Min (Virgin Industrial & Textile Grade) (GB/T 1628-2020 (Superior Grade))
- **Chinese Origin & Loading Ports**: Jiangsu / Shandong / Shanghai, China (Qingdao Port, Shanghai Port, Nanjing / Ningbo Port)
- **Standard Export Packaging**: 30kg / 35kg / 215kg HDPE Drums or 1,050kg IBC Totes
- **20ft FCL Container Load Capacity**: 21.0 MT (600 × 35kg Drums or 20 × 1050kg IBCs per 20ft FCL)
- **IMO / Hazmat Classification**: IMO Class 8 (Corrosive) + Sub-risk Class 3 (Flammable), UN 2789
- **Bangladesh Customs & Regulatory Note**: HS Code 2915.21.00; requires accurate purity & batch COA matching B/L for smooth Chattogram customs assessment.
- **Primary Applications in Bangladesh**: Core neutralization of fabric after caustic mercerizing, scouring, and reactive dyeing; Precision dyebath pH regulation (pH 4.5–5.5) in high-temperature polyester disperse dyeing; Garment washing pH adjustment for cellulase enzyme bio-polishing and cationic softener application; Synthesis of textile auxiliaries, acetate esters, and packaging adhesives
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Acetic Acid Content (w/w)**: Spec `≥ 99.85%` (Typical: `99.91%`, Method: GB/T 1628-2020)
  - **Water Content (Moisture)**: Spec `≤ 0.15%` (Typical: `0.07%`, Method: GB/T 1628-2020)
  - **Color (Pt-Co / Hazen)**: Spec `≤ 10` (Typical: `< 5`, Method: GB/T 1628-2020)
  - **Formic Acid Content**: Spec `≤ 0.05%` (Typical: `0.015%`, Method: GB/T 1628-2020)
  - **Iron (Fe) Content**: Spec `≤ 0.0001% (1.0 ppm)` (Typical: `0.3 ppm`, Method: GB/T 1628-2020)

### Formic Acid 85% & 90% (Methanoic Acid)
- **Canonical URL**: https://hafsasourcing.com/chemicals/formic-acid-85-90
- **SKU**: HS-HCOOH-85 | **CAS Number**: `64-18-6` | **EC Number**: `200-579-1` | **Formula**: `HCOOH`
- **Bangladesh Customs 8-Digit HS Code**: `2915.11.00`
- **Category**: Organic Acids, Chelates & Phosphates
- **Standard Purity / Grade**: 85.0% Min & 90.0% Min (First Grade) (GB/T 2093-2011)
- **Chinese Origin & Loading Ports**: Shandong (Luxi / Feicheng), China (Qingdao Port, Tianjin Port)
- **Standard Export Packaging**: 25kg / 35kg / 250kg HDPE Drums or 1,200kg IBC Totes
- **20ft FCL Container Load Capacity**: 22.4 – 25.0 MT (Drums) / 24.0 MT (20 × 1200kg IBCs)
- **IMO / Hazmat Classification**: IMO Class 8 (Corrosive) + Sub-risk Class 3, UN 1779
- **Bangladesh Customs & Regulatory Note**: Classified under HS Code 2915.11.00; prime Shandong factory origin with vented UN-approved HDPE drums.
- **Primary Applications in Bangladesh**: Leather pickling prior to chrome tanning and fixation of acid dyes & fatliquors in Savar tanneries; Strong, volatile-odor-free pH lowering and alkali neutralization in textile dyeing and printing; Natural rubber latex coagulation and silage/feed preservation
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Formic Acid (HCOOH) Content**: Spec `≥ 85.0% / ≥ 90.0%` (Typical: `85.4% / 90.3%`, Method: GB/T 2093-2011)
  - **Color (Pt-Co / Hazen)**: Spec `≤ 10` (Typical: `5`, Method: GB/T 2093-2011)
  - **Chloride (as Cl-)**: Spec `≤ 0.005%` (Typical: `0.002%`, Method: GB/T 2093-2011)
  - **Sulphate (as SO4 2-)**: Spec `≤ 0.002%` (Typical: `0.001%`, Method: GB/T 2093-2011)
  - **Iron (Fe) Content**: Spec `≤ 0.0005% (5 ppm)` (Typical: `1.5 ppm`, Method: GB/T 2093-2011)

### Oxalic Acid 99.6% (Refined Industrial Grade) (Ethanedioic Acid Dihydrate)
- **Canonical URL**: https://hafsasourcing.com/chemicals/oxalic-acid-99-6
- **SKU**: HS-OXALIC-996 | **CAS Number**: `6153-56-6` | **EC Number**: `205-634-3` | **Formula**: `C2H2O4·2H2O`
- **Bangladesh Customs 8-Digit HS Code**: `2917.11.00`
- **Category**: Organic Acids, Chelates & Phosphates
- **Standard Purity / Grade**: 99.6% Min (Refined White Crystal) (GB/T 1626-2008)
- **Chinese Origin & Loading Ports**: Shandong / Inner Mongolia / Fujian, China (Qingdao Port, Tianjin Port, Xiamen Port)
- **Standard Export Packaging**: 25kg PP Woven Bags with Inner PE Liner
- **20ft FCL Container Load Capacity**: 25.0 – 27.0 MT (1,000–1,080 × 25kg Bags per 20ft FCL)
- **IMO / Hazmat Classification**: IMO Class 8, UN 3260 (or Non-DG per carrier schedule)
- **Bangladesh Customs & Regulatory Note**: Imported under Bangladesh Customs HS Code 2917.11.00; also referenced by anhydrous CAS 144-62-7.
- **Primary Applications in Bangladesh**: Neutralization and clearing of Potassium Permanganate (PP) vintage wash treatments on denim jeans; Chelation and removal of stubborn iron/rust stains from cotton and synthetic textiles; Bleaching and crust color lightening in vegetable and chrome leather tanning; Marble/granite floor polishing and metal surface cleaning
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Oxalic Acid (H2C2O4·2H2O) Purity**: Spec `≥ 99.6%` (Typical: `99.75%`, Method: GB/T 1626-2008)
  - **Sulphate (as SO4 2-)**: Spec `≤ 0.04%` (Typical: `0.02%`, Method: GB/T 1626-2008)
  - **Heavy Metals (as Pb)**: Spec `≤ 0.001% (10 ppm)` (Typical: `5 ppm`, Method: GB/T 1626-2008)
  - **Iron (Fe) Content**: Spec `≤ 0.0015% (15 ppm)` (Typical: `8 ppm`, Method: GB/T 1626-2008)
  - **Ignition Residue (Ash)**: Spec `≤ 0.08%` (Typical: `0.03%`, Method: GB/T 1626-2008)

### Citric Acid Monohydrate & Anhydrous (99.5%–100.5%) (2-Hydroxypropane-1,2,3-Tricarboxylic Acid)
- **Canonical URL**: https://hafsasourcing.com/chemicals/citric-acid-monohydrate-anhydrous
- **SKU**: HS-CITRIC-995 | **CAS Number**: `5949-29-1` | **EC Number**: `201-069-1` | **Formula**: `C6H8O7·H2O`
- **Bangladesh Customs 8-Digit HS Code**: `2918.14.00`
- **Category**: Organic Acids, Chelates & Phosphates
- **Standard Purity / Grade**: 99.5% – 100.5% (BP / USP / FCC / Industrial Grade) (GB 1886.235-2016 / BP / USP)
- **Chinese Origin & Loading Ports**: Shandong (Ensign / TTCA / RZBC / Lemon Star), China (Qingdao Port, Lianyungang Port)
- **Standard Export Packaging**: 25kg Multi-Wall Kraft Paper-Plastic Composite or PP Bags
- **20ft FCL Container Load Capacity**: 25.0 MT (Unpalletized) / 20.0 MT (Palletized) per 20ft FCL
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: HS Code 2918.14.00; available in Monohydrate (CAS 5949-29-1, 8-40 mesh) and Anhydrous (CAS 77-92-9, 30-100 mesh).
- **Primary Applications in Bangladesh**: Non-yellowing, odorless pH neutralization in white/pastel knit and woven fabric finishing; Eco-friendly trivalent metal ion chelating agent (Fe3+, Ca2+, Mg2+) in scouring and bleaching; Chemical cleaning in place (CIP) of inorganic scaling on RO membranes and boilers; Liquid detergent, home care, beverage, and pharmaceutical formulation
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Citric Acid Assay**: Spec `99.5% – 100.5%` (Typical: `99.9%`, Method: BP / USP)
  - **Water Content (CAM / CAA)**: Spec `CAM: 7.5–8.8% | CAA: ≤ 0.5%` (Typical: `8.2% / 0.15%`, Method: BP / USP)
  - **Sulphated Ash**: Spec `≤ 0.05%` (Typical: `0.02%`, Method: BP / USP)
  - **Heavy Metals**: Spec `≤ 5 ppm` (Typical: `< 2 ppm`, Method: BP / USP)
  - **Oxalate**: Spec `≤ 100 ppm` (Typical: `< 30 ppm`, Method: BP / USP)

### Sodium Gluconate 99% (High-Alkali Chelating Grade) (Sodium D-Gluconate)
- **Canonical URL**: https://hafsasourcing.com/chemicals/sodium-gluconate-99
- **SKU**: HS-NAGLU-99 | **CAS Number**: `527-07-1` | **EC Number**: `208-407-7` | **Formula**: `C6H11NaO7`
- **Bangladesh Customs 8-Digit HS Code**: `2918.16.00`
- **Category**: Organic Acids, Chelates & Phosphates
- **Standard Purity / Grade**: 99.0% Min (White Crystalline Powder) (GB/T 26325-2010)
- **Chinese Origin & Loading Ports**: Shandong / Hebei, China (Qingdao Port, Tianjin Port)
- **Standard Export Packaging**: 25kg PP Woven or Kraft Paper Bags with PE Liner
- **20ft FCL Container Load Capacity**: 25.0 – 26.0 MT (1,000–1,040 × 25kg Bags per 20ft FCL)
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Non-DG cargo under Bangladesh Customs HS Code 2918.16.00; biodegradable alternative to EDTA/NTA.
- **Primary Applications in Bangladesh**: High-alkali chelating & sequestering agent in cotton scouring, peroxide bleaching, and mercerizing; Prevents catalytic cellulose pin-holing caused by trace Fe3+ and Cu2+ ions during H2O2 bleaching; Industrial bottle washing, metal degreasing, and high-range water-reducing concrete retarder
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Sodium Gluconate Assay**: Spec `≥ 99.0%` (Typical: `99.3%`, Method: GB/T 26325)
  - **Loss on Drying**: Spec `≤ 0.50%` (Typical: `0.22%`, Method: GB/T 26325)
  - **Reducing Substances**: Spec `≤ 0.50%` (Typical: `0.18%`, Method: GB/T 26325)
  - **pH (10% Solution)**: Spec `6.2 – 7.8` (Typical: `7.1`, Method: GB/T 26325)

### STPP 94% & SHMP 68% (Industrial & Water Softening Phosphates) (Sodium Tripolyphosphate (STPP) & Sodium Hexametaphosphate (SHMP))
- **Canonical URL**: https://hafsasourcing.com/chemicals/stpp-shmp-phosphates
- **SKU**: HS-STPP-SHMP | **CAS Number**: `7758-29-4` | **EC Number**: `231-838-7` | **Formula**: `Na5P3O10 / (NaPO3)6`
- **Bangladesh Customs 8-Digit HS Code**: `2835.31.00`
- **Category**: Organic Acids, Chelates & Phosphates
- **Standard Purity / Grade**: STPP: 94.0% Min (P2O5 ≥ 57%) | SHMP: 68.0% Min Total P2O5 (GB/T 9983-2004 (STPP) / HG/T 2519-2017 (SHMP))
- **Chinese Origin & Loading Ports**: Sichuan / Yunnan / Guizhou / Hubei, China (Chongqing / Shanghai Port, Fangchenggang / Qinzhou Port)
- **Standard Export Packaging**: 25kg PP Woven Bags with Double PE Inner Liner
- **20ft FCL Container Load Capacity**: 25.0 – 27.0 MT (1,000–1,080 × 25kg Bags per 20ft FCL)
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: STPP uses HS Code 2835.31.00; SHMP (CAS 10124-56-8) uses HS Code 2835.39.00.
- **Primary Applications in Bangladesh**: SHMP 68%: Dyebath water softening and Ca2+/Mg2+ sequestration in textile pretreatment and dyeing; STPP 94%: Primary builder and soil-suspending agent in synthetic detergent powders; Ceramic clay slip deflocculant and viscosity reducer in sanitaryware and tile factories
- **Typical Certificate of Analysis (COA) Parameters**:
  - **STPP Assay (Na5P3O10) / Total P2O5**: Spec `≥ 94.0% / ≥ 57.0%` (Typical: `95.2% / 57.4%`, Method: GB/T 9983-2004)
  - **SHMP Total P2O5 / Inactive P2O5**: Spec `≥ 68.0% / ≤ 7.5%` (Typical: `68.3% / 6.8%`, Method: HG/T 2519-2017)
  - **Water Insoluble Matter**: Spec `≤ 0.05%` (Typical: `0.02%`, Method: GB/T 9983-2004)
  - **Whiteness**: Spec `≥ 90.0%` (Typical: `93.5%`, Method: GB/T 9983-2004)

### Wetting, Scouring & Mercerizing Agents (APEO/NPEO-Free) (Fatty Alcohol Ethoxylates (AEO-7/AEO-9) & Alkali-Stable Phosphate Esters)
- **Canonical URL**: https://hafsasourcing.com/chemicals/wetting-scouring-mercerizing-agents
- **SKU**: HS-AUX-WET | **CAS Number**: `68439-50-9` | **EC Number**: `500-213-3` | **Formula**: `RO(CH2CH2O)nH`
- **Bangladesh Customs 8-Digit HS Code**: `3402.90.00`
- **Category**: Textile Pretreatment, Dyeing & Finishing Auxiliaries
- **Standard Purity / Grade**: 99% Conc. Base (AEO-7/9) & 1:4 High-Conc. Formulated Blends (ZDHC MRSL v3.1 Level 3 / OEKO-TEX® Eco Passport)
- **Chinese Origin & Loading Ports**: Zhejiang / Jiangsu / Guangdong, China (Shanghai Port, Ningbo Port, Guangzhou Port)
- **Standard Export Packaging**: 125kg / 200kg HDPE Drums or 1,000kg IBC Totes
- **20ft FCL Container Load Capacity**: 19.2 – 20.0 MT (Drums / 20 × 1000kg IBCs per 20ft FCL)
- **IMO / Hazmat Classification**: Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Classified under HS Code 3402.90.00 or 3809.91.00; 100% APEO/NPEO-Free declaration provided on COA/SDS.
- **Primary Applications in Bangladesh**: Rapid wetting, wax emulsification, and oil scouring in continuous and exhaust cotton pretreatment; High-caustic mercerizing wetting agent (stable at 260–300 g/L NaOH without phase separation); Low-foam jet/airflow dyeing machine scouring at high shear rates
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Active Content (Concentrate Base)**: Spec `≥ 90.0% – 99.0%` (Typical: `99.2%`, Method: GB/T 17829)
  - **APEO / NPEO / OPEO Content**: Spec `Not Detected (< 10 ppm)` (Typical: `ND (ZDHC Compliant)`, Method: LC-MS / ISO 18254)
  - **Alkali Resistance (NaOH)**: Spec `Up to 180–300 g/L (Grade Dependent)` (Typical: `Clear, No Separation`, Method: Internal Mill Std)
  - **Draves Sinking Time (2 g/L)**: Spec `≤ 5 Seconds` (Typical: `2.8 Seconds`, Method: AATCC 17)

### Formaldehyde-Free Fixing, Leveling, Soaping & Peroxide Stabilizer Concentrates (Polyamine Fixing Resin, Acrylic-Maleic Copolymer & Organic Stabilizer Concentrates)
- **Canonical URL**: https://hafsasourcing.com/chemicals/peroxide-stabilizer-fixing-soaping-agents
- **SKU**: HS-AUX-DYE | **CAS Number**: `26062-79-3` | **EC Number**: `Polymer` | **Formula**: `Polymeric Condensate`
- **Bangladesh Customs 8-Digit HS Code**: `3809.91.00`
- **Category**: Textile Pretreatment, Dyeing & Finishing Auxiliaries
- **Standard Purity / Grade**: 60% – 75% High-Concentration Mother Liquor (1:3 to 1:5 Dilution) (ZDHC MRSL v3.1 / OEKO-TEX® Class I (< 16 ppm Formaldehyde))
- **Chinese Origin & Loading Ports**: Zhejiang / Jiangsu / Shandong, China (Shanghai Port, Ningbo Port, Qingdao Port)
- **Standard Export Packaging**: 125kg / 200kg HDPE Drums or 1,000kg IBC Totes
- **20ft FCL Container Load Capacity**: 20.0 MT (100 × 200kg Drums or 20 × 1000kg IBCs per 20ft FCL)
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Imported under Bangladesh Customs Textile Auxiliary HS Code 3809.91.00; qualifies for Bonded Warehouse UD import.
- **Primary Applications in Bangladesh**: Formaldehyde-Free Fixing Agent: Elevates wet rubbing, washing, and perspiration fastness of deep red/black/turquoise reactive dyes to Grade 4–4.5; Silicate-Free Peroxide Stabilizer: Controls H2O2 decomposition rate without hard silicate scale buildup on dyeing rollers; Soaping-Off Agent: Strips unfixed hydrolyzed reactive dyes in 1 bath at 90–95°C without staining white stripes
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Solid / Active Content (Concentrate)**: Spec `≥ 60.0% – 75.0%` (Typical: `65.4%`, Method: GB/T 1725)
  - **Free Formaldehyde**: Spec `Not Detected (< 15 ppm)` (Typical: `ND (< 5 ppm)`, Method: ISO 14184-1)
  - **Wet Rubbing & Wash Fastness Upgrade**: Spec `+1.0 to +1.5 Grade Improvement` (Typical: `Grade 4.5 Achieved`, Method: ISO 105-C06 / X12)
  - **Shade Change (ΔE)**: Spec `≤ 0.4 (Minimal Shade Shift)` (Typical: `0.22`, Method: CMC (2:1))

### Hydrophilic Block Silicone Oil (70–100%) & Cationic Softener Flakes (100%) (Polyether-Amino Block Copolymer Polysiloxane & Fatty Acid Imidazoline Esterquat Flakes)
- **Canonical URL**: https://hafsasourcing.com/chemicals/hydrophilic-block-silicone-softener-flakes
- **SKU**: HS-AUX-FINISH | **CAS Number**: `68554-65-4` | **EC Number**: `Polymer` | **Formula**: `R-Si(CH3)2-O-[Si(R)(CH3)O]n`
- **Bangladesh Customs 8-Digit HS Code**: `3910.00.00`
- **Category**: Textile Pretreatment, Dyeing & Finishing Auxiliaries
- **Standard Purity / Grade**: Silicone Crude Oil: 70%–100% Active | Softener Flakes: 100% Solid Active (ZDHC MRSL v3.1 (D4/D5/D6 Cyclosiloxane < 1000 ppm))
- **Chinese Origin & Loading Ports**: Zhejiang / Jiangsu / Guangdong, China (Shanghai Port, Ningbo Port, Huangpu Port)
- **Standard Export Packaging**: Silicone Oil: 120kg/200kg Drums | Softener Flakes: 25kg PP Woven Bags
- **20ft FCL Container Load Capacity**: Silicone Oil: 19.2 MT (Drums) | Softener Flakes: 17.5–20.0 MT (25kg Bags)
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Silicone Oils use HS Code 3910.00.00; Softener Flakes use HS Code 3809.91.00.
- **Primary Applications in Bangladesh**: Hydrophilic Block Silicone: Imparts bouncy, cool, ultra-soft handfeel with <3 second water absorbency on cotton jersey, fleece, and terry towels; Amino Silicone Micro-Emulsion Base: Deep, silky drape and elasticity recovery on woven twill, poplin, and denim; Cationic & Weak-Cationic Softener Flakes: Diluted at 5%–10% in mills for lofty, antistatic finishing of yarn and knit fabrics
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Active Silicone / Solid Content**: Spec `Crude Oil: 70–98% | Flakes: ≥ 99%` (Typical: `80.5% / 99.4%`, Method: GB/T 1725)
  - **Water Absorbency (Drop Test)**: Spec `≤ 3.0 Seconds (Hydrophilic Grade)` (Typical: `1.8 Seconds`, Method: AATCC 79)
  - **Cyclic Siloxanes (D4 / D5 / D6 Each)**: Spec `< 1,000 ppm (0.1% w/w)` (Typical: `< 350 ppm`, Method: GC-MS (REACH/ZDHC))
  - **Phenolic & Thermal Yellowing (180°C)**: Spec `Grade 4.5 Min` (Typical: `Grade 4.5–5.0`, Method: ISO 105-X18)

### Textile Enzymes (Bio-Polishing Cellulase, Peroxide-Killer Catalase & Amylase) (Fermentation-Derived Neutral/Acid Cellulase, Catalase & Alpha-Amylase Concentrates)
- **Canonical URL**: https://hafsasourcing.com/chemicals/textile-enzymes-cellulase-catalase-amylase
- **SKU**: HS-ENZ-BIO | **CAS Number**: `9012-54-8` | **EC Number**: `232-734-4` | **Formula**: `Enzymatic Protein Complex`
- **Bangladesh Customs 8-Digit HS Code**: `3507.90.00`
- **Category**: Textile Pretreatment, Dyeing & Finishing Auxiliaries
- **Standard Purity / Grade**: High-Activity Crude Concentrates (Catalase: 50k–200k U/mL | Cellulase: 10k–50k NCU/g) (GOTS v7.0 / ZDHC MRSL v3.1 / OEKO-TEX® Eco Passport)
- **Chinese Origin & Loading Ports**: Shandong / Jiangsu / Hebei, China (Qingdao Port, Shanghai Port, Tianjin Port)
- **Standard Export Packaging**: 25kg / 30kg HDPE Jerrycans or 200kg HDPE Drums (Liquid) & 25kg Fiber Drums (Granular)
- **20ft FCL Container Load Capacity**: 18.0 – 20.0 MT (Drums / Jerrycans per 20ft FCL)
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Imported under Bangladesh Customs Enzyme HS Code 3507.90.00; qualifies for duty-free Bonded Warehouse import.
- **Primary Applications in Bangladesh**: Bio-Polishing Cellulase: Removes surface micro-fibrils and pilling fuzz from cotton knitwear (Grade 4.5 pilling resistance) with <2.5% strength loss; Catalase (Peroxide Killer): Completely eliminates residual H2O2 after bleaching prior to reactive dyeing without draining the bath; Denim Abrasion Granular & Liquid Cellulase: High-contrast stone-free vintage look in garment washing plants; Alpha-Amylase: Rapid starch size removal on woven cotton/blended grey fabrics across 40°C–95°C
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Catalase Activity (Liquid Crude)**: Spec `≥ 50,000 – 200,000 U/mL` (Typical: `105,000 U/mL`, Method: QB/T 2583)
  - **Neutral / Acid Cellulase Activity**: Spec `≥ 15,000 – 50,000 NCU/g` (Typical: `28,000 NCU/g`, Method: CMC / Filter Paper Assay)
  - **Optimal Operating pH Range**: Spec `Acid: 4.5–5.5 | Neutral: 5.8–7.0` (Typical: `Complies`, Method: Mill Application)
  - **Pilling Resistance After Bio-Polish**: Spec `≥ Grade 4.0 – 4.5` (Typical: `Grade 4.5`, Method: ISO 12945-2)

### Optical Brightening Agents — OBA (4BM / BA-L, BBU, VBL, CXT & OB-1) (Fluorescent Whitening Agents (Stilbene Disulfonate & Triazine Derivatives))
- **Canonical URL**: https://hafsasourcing.com/chemicals/optical-brightening-agents-oba-4bm-bbu-vbl
- **SKU**: HS-OBA-SERIES | **CAS Number**: `12768-92-2` | **EC Number**: `235-807-2` | **Formula**: `C40H40N12O8S2Na2`
- **Bangladesh Customs 8-Digit HS Code**: `3204.20.00`
- **Category**: Textile Pretreatment, Dyeing & Finishing Auxiliaries
- **Standard Purity / Grade**: 100% / 200% / 300% Export Standard UV E-Value Strength (Liquid & Powder) (HG/T 3726 / ZDHC MRSL v3.1 Compliant)
- **Chinese Origin & Loading Ports**: Hebei / Shandong / Zhejiang, China (Qingdao Port, Shanghai Port, Tianjin Port)
- **Standard Export Packaging**: 25kg Fiber Drums with Double PE Liners (Powder) or 200kg/1000kg IBC (Liquid BA-L)
- **20ft FCL Container Load Capacity**: 14.0 – 16.0 MT (Fiber Drums) / 20.0 MT (Liquid IBCs) per 20ft FCL
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Classified under dedicated Bangladesh Customs Fluorescent Brightening Agent HS Code 3204.20.00.
- **Primary Applications in Bangladesh**: OBA 4BM / BA-L (C.I. 113) & BBU (C.I. 220): Exhaust and pad-batch optical brightening of cotton knits, yarn, and woven fabrics; OBA ER-I / ER-II (C.I. 199): High-temperature & pad-thermosol whitening of polyester and CVC/PC blends; OBA CXT (C.I. 71) & CBS-X (C.I. 351): High-stability whitening in synthetic laundry detergent powders and liquid detergents; OBA OB-1 (C.I. 393): Masterbatch, recycled PET flake, and engineering plastic whitening
- **Typical Certificate of Analysis (COA) Parameters**:
  - **UV Extinction Value (E 1% 1cm)**: Spec `BBU: ≥ 360 | VBL: ≥ 540 | CXT: ≥ 510` (Typical: `100.5% Std Strength`, Method: HG/T 3726)
  - **Shade & CIE Whiteness vs. Standard**: Spec `Similar (ΔW ≤ ±1.5)` (Typical: `Complies (Bluish/Violet)`, Method: Datacolor CIE Whiteness)
  - **Insoluble Matter in Water**: Spec `≤ 0.20%` (Typical: `0.06%`, Method: HG/T 3726)
  - **Fineness (Residue on 180 μm Sieve)**: Spec `≤ 2.0%` (Typical: `0.5%`, Method: HG/T 3726)

### Reactive Dyes (VS/MCT), Disperse Dyes & Vat Indigo Granular 94% (Vinyl Sulphone & Bifunctional Reactive Dyes, High-Energy Disperse Dyes & Vat Blue 1 (Indigo 94%))
- **Canonical URL**: https://hafsasourcing.com/chemicals/reactive-disperse-indigo-dyestuffs
- **SKU**: HS-DYE-SERIES | **CAS Number**: `17095-24-8` | **EC Number**: `241-164-5` | **Formula**: `Synthetic Chromophore Series`
- **Bangladesh Customs 8-Digit HS Code**: `3204.16.00`
- **Category**: Textile Dyestuffs (Reactive, Disperse & Indigo)
- **Standard Purity / Grade**: 100% / 133% / 150% / 300% Export Standard Strength (Salt-Free / Low-PCA) (ZDHC MRSL v3.1 / OEKO-TEX® Eco Passport (Banned Azo-Free < 20 ppm))
- **Chinese Origin & Loading Ports**: Zhejiang (Shaoxing) / Jiangsu / Shandong, China (Shanghai Port, Ningbo Port, Qingdao Port)
- **Standard Export Packaging**: 25kg Iron Drums, Fiber Drums, or Heavy-Duty Export Cartons with Double PE Bags
- **20ft FCL Container Load Capacity**: 14.0 – 18.0 MT (Palletized Cartons / Drums per 20ft FCL)
- **IMO / Hazmat Classification**: Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Reactive Dyes: HS 3204.16.00 | Disperse Dyes: HS 3204.11.00 | Vat Indigo 94% (CAS 482-89-3): HS 3204.15.00 | Sulphur Black: HS 3204.19.00.
- **Primary Applications in Bangladesh**: Reactive Dyes (Yellow 145, Red 195, Blue 19/222, Black 5 / WNN): Exhaust and continuous dyeing of 100% cotton knit and woven fabrics; Disperse Dyes (Black ECT 300%, Blue 79, Red 60/167, Yellow 211): High-temperature (130°C) dyeing of polyester, CVC, and PC blends; Vat Indigo Granular 94% & Sulphur Black BR 200%: Rope and slasher dyeing of export denim warp yarns
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Tinctorial Strength vs. Standard**: Spec `100% ± 2% (or 150% / 300% Spec)` (Typical: `100.4%`, Method: GB/T 2374)
  - **Shade Difference (ΔE CMC 2:1)**: Spec `≤ 0.30` (Typical: `0.18`, Method: Datacolor Spectrophotometer)
  - **Banned Aromatic Amines (24 Azo List)**: Spec `Not Detected (< 20 ppm)` (Typical: `ND (< 5 ppm)`, Method: EN 14362-1)
  - **Para-Chloroaniline (PCA) Content**: Spec `< 50 ppm (ZDHC v3.1)` (Typical: `< 15 ppm`, Method: LC-MS)

### PAC (Poly Aluminium Chloride) 28%–30% Spray-Dried (Polyaluminium Chloride Hydroxide)
- **Canonical URL**: https://hafsasourcing.com/chemicals/pac-poly-aluminium-chloride-30
- **SKU**: HS-PAC-30 | **CAS Number**: `1327-41-9` | **EC Number**: `215-477-2` | **Formula**: `[Al2(OH)nCl6-n]m`
- **Bangladesh Customs 8-Digit HS Code**: `2827.32.00`
- **Category**: ETP & Water Treatment Chemicals
- **Standard Purity / Grade**: 28.0% – 30.0% Min Al2O3 (Spray-Dried Golden Yellow / Light Yellow Powder) (GB/T 22627-2022 / GB 15892-2020)
- **Chinese Origin & Loading Ports**: Henan (Gongyi) / Shandong, China (Qingdao Port, Tianjin Port)
- **Standard Export Packaging**: 25kg PP Woven Bags with Inner PE Liner
- **20ft FCL Container Load Capacity**: 25.0 – 26.0 MT (1,000–1,040 × 25kg Bags per 20ft FCL)
- **IMO / Hazmat Classification**: Non-DG Cargo (or Class 8 in select carriers)
- **Bangladesh Customs & Regulatory Note**: Imported under Bangladesh Customs HS Code 2827.32.00; low water-insoluble (<0.3%) spray-dried grade prevents dosing pump clogging.
- **Primary Applications in Bangladesh**: Primary inorganic coagulation of suspended solids, COD, and colloidal dyes in textile ETPs; Raw river and surface water clarification in industrial Water Treatment Plants (WTP); Neutral rosins sizing retention and pitch control in pulp and paper manufacturing
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Aluminium Oxide (Al2O3) Content**: Spec `≥ 28.0% / ≥ 30.0%` (Typical: `30.2%`, Method: GB/T 22627-2022)
  - **Basicity**: Spec `40.0% – 90.0%` (Typical: `78.5%`, Method: GB/T 22627-2022)
  - **Water Insoluble Matter**: Spec `≤ 0.30% (Spray-Dried)` (Typical: `0.12%`, Method: GB/T 22627-2022)
  - **pH (10 g/L Aqueous Solution)**: Spec `3.5 – 5.0` (Typical: `4.2`, Method: GB/T 22627-2022)

### Textile ETP Decolorizing Agent (CW-08 / Dicyandiamide Resin 50%) (Dicyandiamide-Formaldehyde Cationic Quaternary Polymer)
- **Canonical URL**: https://hafsasourcing.com/chemicals/textile-etp-decolorizing-agent-cw08
- **SKU**: HS-DECOLOR-50 | **CAS Number**: `55295-98-2` | **EC Number**: `Polymer` | **Formula**: `(C3H8N4O)n`
- **Bangladesh Customs 8-Digit HS Code**: `3909.39.00`
- **Category**: ETP & Water Treatment Chemicals
- **Standard Purity / Grade**: 50.0% ± 2.0% Solid Content (High Cationic Charge Density) (Enterprise Export Standard (CW-08 / BWD-01 Grade))
- **Chinese Origin & Loading Ports**: Jiangsu (Yixing) / Shandong, China (Shanghai Port, Qingdao Port, Nanjing Port)
- **Standard Export Packaging**: 30kg / 250kg HDPE Drums or 1,250kg IBC Totes
- **20ft FCL Container Load Capacity**: 20.0 MT (80 × 250kg Drums) / 22.5 MT (18 × 1250kg IBCs per 20ft FCL)
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Classified under HS Code 3909.39.00 or 3809.91.00; Non-DG liquid polymer.
- **Primary Applications in Bangladesh**: 95%+ color removal from high-colority cotton reactive, indigo, acid, and disperse dye house wastewater; Simultaneous 50%–70% COD reduction when dosed alongside Poly Aluminium Chloride (PAC); Pulp & paper effluent decolorization and printing ink wastewater treatment
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Solid Content**: Spec `≥ 50.0% ± 2.0%` (Typical: `51.2%`, Method: GB/T 1725)
  - **Viscosity (25°C)**: Spec `50 – 300 mPa·s` (Typical: `145 mPa·s`, Method: Brookfield Viscometer)
  - **pH Value (30% Solution)**: Spec `3.0 – 5.0` (Typical: `4.1`, Method: pH Meter)
  - **Specific Gravity (20°C)**: Spec `1.20 – 1.30 g/cm³` (Typical: `1.24 g/cm³`, Method: Hydrometer)

### PAM (Polyacrylamide — Anionic APAM & Cationic CPAM Flocculant) (Poly(2-propenamide) High-Molecular Weight Polyelectrolyte)
- **Canonical URL**: https://hafsasourcing.com/chemicals/pam-polyacrylamide-anionic-cationic
- **SKU**: HS-PAM-90 | **CAS Number**: `9003-05-8` | **EC Number**: `Polymer` | **Formula**: `(C3H5NO)n`
- **Bangladesh Customs 8-Digit HS Code**: `3906.90.00`
- **Category**: ETP & Water Treatment Chemicals
- **Standard Purity / Grade**: Solid Content ≥ 89.0% (APAM MW: 12–22 Million Da | CPAM Ionicity: 20%–60%) (GB/T 17514-2017 / GB/T 31246-2014)
- **Chinese Origin & Loading Ports**: Shandong / Henan / Jiangsu, China (Qingdao Port, Shanghai Port)
- **Standard Export Packaging**: 25kg Multi-Wall Kraft Paper or PP Bags with Moisture-Proof PE Liner
- **20ft FCL Container Load Capacity**: 20.0 – 22.0 MT (800–880 × 25kg Bags per 20ft FCL)
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Non-DG cargo under Bangladesh Customs HS Code 3906.90.00; low free acrylamide monomer (<0.05%).
- **Primary Applications in Bangladesh**: Anionic PAM (APAM): Coagulation-flocculation aid in primary/secondary ETP sedimentation clarifiers; Cationic PAM (CPAM): Conditioning biological and physico-chemical ETP sludge for filter/screw press dewatering; Paper retention and drainage aid, ceramic wastewater settling, and sugar juice clarification
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Solid Content**: Spec `≥ 89.0% – 90.0%` (Typical: `90.4%`, Method: GB/T 17514-2017)
  - **Molecular Weight (Anionic APAM)**: Spec `12.0 – 22.0 Million Daltons` (Typical: `18.0 Million Da`, Method: Intrinsic Viscosity)
  - **Cationic Degree (Cationic CPAM)**: Spec `20% – 60% (Tailored to Sludge)` (Typical: `40% Ionicity`, Method: Colloid Titration)
  - **Dissolution Time (Distilled Water)**: Spec `≤ 45 – 60 Minutes` (Typical: `40 Minutes`, Method: GB/T 17514-2017)
  - **Free Acrylamide Monomer**: Spec `≤ 0.05%` (Typical: `0.018%`, Method: HPLC)

### Ferrous Sulphate Heptahydrate 98% (ETP & Industrial Grade) (Iron(II) Sulphate Heptahydrate)
- **Canonical URL**: https://hafsasourcing.com/chemicals/ferrous-sulphate-heptahydrate-98
- **SKU**: HS-FESO4-98 | **CAS Number**: `7782-63-0` | **EC Number**: `231-753-5` | **Formula**: `FeSO4·7H2O`
- **Bangladesh Customs 8-Digit HS Code**: `2833.29.00`
- **Category**: ETP & Water Treatment Chemicals
- **Standard Purity / Grade**: 98.0% Min (Fe2+ ≥ 19.7%, Dry Centrifuge Refined) (HG/T 2935-2006)
- **Chinese Origin & Loading Ports**: Shandong / Guangxi / Sichuan, China (Qingdao Port, Fangchenggang Port, Nanjing Port)
- **Standard Export Packaging**: 25kg or 50kg PP Woven Bags with PE Liner
- **20ft FCL Container Load Capacity**: 27.0 MT (1,080 × 25kg or 540 × 50kg Bags per 20ft FCL)
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Non-DG heavy container cargo (27 MT/FCL) under Bangladesh Customs HS Code 2833.29.00.
- **Primary Applications in Bangladesh**: Primary coagulation and reductive decolorization of reactive, sulfur, and vat dye effluent in textile ETPs; Catalyst in Fenton reagent (Fe2+ + H2O2) advanced oxidation for refractory COD destruction; Phosphate removal, cement chromate reduction, and agricultural micronutrient fertilizer
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Ferrous Sulphate (FeSO4·7H2O)**: Spec `≥ 98.0%` (Typical: `98.5%`, Method: HG/T 2935-2006)
  - **Ferrous Iron (Fe2+) Content**: Spec `≥ 19.7%` (Typical: `20.0%`, Method: HG/T 2935-2006)
  - **Free Acid (as H2SO4)**: Spec `≤ 0.50%` (Typical: `0.22%`, Method: HG/T 2935-2006)
  - **Water Insoluble Matter**: Spec `≤ 0.10%` (Typical: `0.04%`, Method: HG/T 2935-2006)

### Calcium Hypochlorite 65% / 70% (Sodium Process Granular) (Calcium Hypochlorite Granular (High-Test Hypochlorite / HTH))
- **Canonical URL**: https://hafsasourcing.com/chemicals/calcium-hypochlorite-70-bleaching-powder
- **SKU**: HS-CAHYPO-70 | **CAS Number**: `7778-54-3` | **EC Number**: `231-908-7` | **Formula**: `Ca(ClO)2`
- **Bangladesh Customs 8-Digit HS Code**: `2828.10.00`
- **Category**: ETP & Water Treatment Chemicals
- **Standard Purity / Grade**: 65.0% Min & 70.0% Min Effective Chlorine (Low Insolubles Sodium Process) (GB/T 10666-2019)
- **Chinese Origin & Loading Ports**: Hubei / Shandong / Henan, China (Wuhan / Shanghai Port, Qingdao Port)
- **Standard Export Packaging**: 40kg / 45kg / 50kg UN-Approved Plastic Drums
- **20ft FCL Container Load Capacity**: 21.6 MT (480 × 45kg Drums per 20ft DG FCL)
- **IMO / Hazmat Classification**: IMO Class 5.1 (Oxidizing Substance), UN 2880 / UN 1748
- **Bangladesh Customs & Regulatory Note**: Classified under Bangladesh Customs HS Code 2828.10.00; shipped in UN-certified 45kg plastic drums with DG manifest.
- **Primary Applications in Bangladesh**: Controlled chlorine bleach-down and vintage fade washing of indigo denim jeans; Potable water disinfection, cooling tower biocide treatment, and ETP final effluent chlorination; Sanitization of food/beverage processing surfaces and hospital/institutional hygiene
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Effective Chlorine Content**: Spec `≥ 65.0% / ≥ 70.0%` (Typical: `70.8%`, Method: GB/T 10666-2019)
  - **Moisture Content**: Spec `4.0% – 10.0%` (Typical: `6.5%`, Method: GB/T 10666-2019)
  - **Granular Size (14–50 Mesh)**: Spec `≥ 90.0%` (Typical: `93.5%`, Method: GB/T 10666-2019)
  - **Water Insoluble Matter (Sodium Process)**: Spec `≤ 2.5%` (Typical: `1.4%`, Method: GB/T 10666-2019)

### Sodium Formate 95%–97% (Leather Tanning & Dyeing Buffer Grade) (Sodium Methanoate)
- **Canonical URL**: https://hafsasourcing.com/chemicals/sodium-formate-96-leather-textile
- **SKU**: HS-HCOONA-96 | **CAS Number**: `141-53-7` | **EC Number**: `205-488-0` | **Formula**: `HCOONa`
- **Bangladesh Customs 8-Digit HS Code**: `2915.12.00`
- **Category**: Organic Acids, Chelates & Phosphates
- **Standard Purity / Grade**: 95.0% Min & 97.0% Min (White Crystalline Powder) (SH/T 1628.2 / Enterprise Export Standard)
- **Chinese Origin & Loading Ports**: Shandong / Hebei, China (Qingdao Port, Tianjin Port)
- **Standard Export Packaging**: 25kg PP Woven Bags with PE Inner Liner (or 1,000kg Jumbo Bags)
- **20ft FCL Container Load Capacity**: 25.0 – 27.0 MT (1,000–1,080 × 25kg Bags per 20ft FCL)
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Non-DG cargo under Bangladesh Customs HS Code 2915.12.00; primary masking/neutralizing salt for Savar tanneries.
- **Primary Applications in Bangladesh**: Camouflage/masking agent and neutralizing salt in chrome tanning processes at Savar tanneries; Buffering agent for strong mineral and organic acids in textile dyeing and printing baths; Reducing agent for precious metals and eco-friendly de-icing/drilling fluid additive
- **Typical Certificate of Analysis (COA) Parameters**:
  - **Sodium Formate (HCOONa) Content**: Spec `≥ 95.0% / ≥ 97.0%` (Typical: `97.4%`, Method: Titration)
  - **Moisture (Water Content)**: Spec `≤ 0.50%` (Typical: `0.21%`, Method: GB/T 6284)
  - **Sodium Hydroxide / Carbonate**: Spec `≤ 0.50%` (Typical: `0.18%`, Method: Titration)
  - **Sodium Chloride (NaCl)**: Spec `≤ 0.30%` (Typical: `0.11%`, Method: Argentometric)

### SLES 70% (Sodium Lauryl Ether Sulfate) & LABSA 96% (Sodium Laureth Sulfate (SLES 70%) & Linear Alkyl Benzene Sulfonic Acid (LABSA 96%))
- **Canonical URL**: https://hafsasourcing.com/chemicals/sles-70-labsa-96-surfactants
- **SKU**: HS-SURF-SLES-LABSA | **CAS Number**: `68585-34-2` | **EC Number**: `500-223-8` | **Formula**: `RO(CH2CH2O)nSO3Na / R-C6H4-SO3H`
- **Bangladesh Customs 8-Digit HS Code**: `3402.31.00`
- **Category**: Surfactants, Pigments & Detergent Raw Materials
- **Standard Purity / Grade**: SLES: 70.0% ± 2.0% Active | LABSA: 96.0% Min Active (GB/T 13529-2022 (SLES) / GB/T 8447-2008 (LABSA))
- **Chinese Origin & Loading Ports**: Zhejiang (Zanyu) / Jiangsu / Shandong, China (Shanghai Port, Ningbo Port, Nanjing Port, Qingdao Port)
- **Standard Export Packaging**: SLES: 170kg/220kg Open-Top Drums | LABSA: 215kg HDPE Drums or 1,050kg IBCs
- **20ft FCL Container Load Capacity**: SLES: 19.38 MT (114 × 170kg Drums) | LABSA: 17.2–21.0 MT per 20ft FCL
- **IMO / Hazmat Classification**: SLES: Non-DG | LABSA: IMO Class 8 (Corrosive), UN 2586
- **Bangladesh Customs & Regulatory Note**: Both SLES 70% (CAS 68585-34-2) and LABSA 96% (CAS 27176-87-0) classify under BD Customs HS 3402.31.00 / 3402.39.00.
- **Primary Applications in Bangladesh**: SLES 70%: Primary foaming and cleansing surfactant for liquid dishwash, laundry liquid, handwash, shampoo, and textile scouring agents; LABSA 96%: Neutralized with Caustic Soda or Soda Ash to produce LAS-Na for laundry detergent powders, detergent bars, and industrial cleaners
- **Typical Certificate of Analysis (COA) Parameters**:
  - **SLES Active Matter Content**: Spec `70.0% ± 2.0%` (Typical: `70.4%`, Method: GB/T 13529)
  - **SLES 1,4-Dioxane Content**: Spec `≤ 30 ppm (or ≤ 50 ppm)` (Typical: `18 ppm`, Method: GC-MS)
  - **LABSA Active Matter Content**: Spec `≥ 96.0%` (Typical: `96.5%`, Method: GB/T 8447)
  - **LABSA Free Sulfuric Acid**: Spec `≤ 1.5%` (Typical: `0.95%`, Method: GB/T 8447)
  - **Color (Klett / Hazen)**: Spec `SLES: ≤ 15 Hazen | LABSA: ≤ 35 Klett` (Typical: `8 Hazen / 22 Klett`, Method: Spectrophotometer)

### Titanium Dioxide (TiO2) Rutile (R-996 / BLR-699) & Anatase (A-101) (Titanium(IV) Oxide White Pigment)
- **Canonical URL**: https://hafsasourcing.com/chemicals/titanium-dioxide-rutile-anatase
- **SKU**: HS-TIO2-R996 | **CAS Number**: `13463-67-7` | **EC Number**: `236-675-5` | **Formula**: `TiO2`
- **Bangladesh Customs 8-Digit HS Code**: `3206.11.00`
- **Category**: Surfactants, Pigments & Detergent Raw Materials
- **Standard Purity / Grade**: Rutile (Zr/Al Surface Treated ≥ 94%–98%) & Anatase (≥ 98.5%) (ISO 591-1:2000 (Type R2 & Type A1))
- **Chinese Origin & Loading Ports**: Sichuan / Henan / Shandong / Anhui, China (Qingdao Port, Shanghai Port, Chongqing / Fangchenggang)
- **Standard Export Packaging**: 25kg Multi-Wall Valve Paper Bags (Palletized & Stretch-Wrapped)
- **20ft FCL Container Load Capacity**: 22.0 – 25.0 MT (Palletized 25kg Bags per 20ft FCL)
- **IMO / Hazmat Classification**: Non-Hazardous / Non-DG Cargo
- **Bangladesh Customs & Regulatory Note**: Surface-treated Rutile TiO2 (≥80% TiO2) imports under HS Code 3206.11.00; untreated Anatase under HS Code 2823.00.00.
- **Primary Applications in Bangladesh**: High-coverage White Rubber Paste (Khadi) and discharge printing paste for dark cotton T-shirts and hoodies; Architectural interior/exterior emulsion paints, industrial coatings, and printing inks; Polyolefin white masterbatch, uPVC pipes/profiles, paper opacity, and ceramic glazes
- **Typical Certificate of Analysis (COA) Parameters**:
  - **TiO2 Content**: Spec `Rutile: ≥ 94.0% | Anatase: ≥ 98.5%` (Typical: `95.2% / 98.8%`, Method: ISO 591-1)
  - **Rutile Conversion Ratio**: Spec `≥ 98.0% (Rutile Grade)` (Typical: `98.7%`, Method: XRD)
  - **Lightness (CIE L*)**: Spec `≥ 97.5` (Typical: `98.1`, Method: CIELAB)
  - **Oil Absorption (g/100g)**: Spec `≤ 19.0 – 21.0` (Typical: `18.2`, Method: ISO 787-5)
  - **Residue on 45 μm Sieve**: Spec `≤ 0.02%` (Typical: `0.006%`, Method: ISO 787-7)

---

## 4. China-to-Bangladesh Maritime Trade Corridors & Transit Schedule

| Port of Loading (China) | Port of Discharge (Bangladesh) | Typical Sea Transit | Container Detention Free Time | Dominant Chemical Cargoes |
|---|---|---|---|---|
| Qingdao Port (Shandong) | Chattogram Sea Port (BD) | 14–17 Days | 14–21 Days Detention Free | Caustic Soda 99%, Soda Ash, H2O2 50%, Formic Acid, Oxalic Acid, Citric Acid, PAC 30%, PAM |
| Tianjin / Xingang (Hebei & Inner Mongolia) | Chattogram / Mongla Port | 15–19 Days | 14–21 Days Detention Free | Caustic Soda Flakes/Pearls, Soda Ash Dense/Light, Sodium Bicarbonate, Sodium Formate |
| Shanghai & Ningbo (Zhejiang / Jiangsu) | Chattogram Port / Kamalapur ICD | 12–15 Days | 14–21 Days Detention Free | Glacial Acetic Acid, Textile Auxiliaries, Block Silicone Oils, Reactive & Disperse Dyes, SLES 70%, LABSA 96%, ETP Decolorizer |
| Guangzhou (Huangpu) & Shenzhen (Shekou) | Chattogram Sea Port (BD) | 10–14 Days | 14 Days DG / 21 Days Non-DG | Sodium Hydrosulphite (Hydrose 88%/90%), Denim Washing Auxiliaries, Specialty Silicone Emulsions |

---

## 5. Standard Operating Procedure (SOP): Importing Chemicals into Bangladesh via L/C

01. **Technical Inquiry & CAS / Grade Matching** (Same-Day Technical Review): Submit your target chemical name, CAS Registry Number, required purity grade, packaging format (25kg bags, HDPE drums, or IBC totes), and 20ft FCL volume. Deliverables: Target CAS & Assay Match, Batch COA & MSDS/SDS Preview, ZDHC / OEKO-TEX® Certificate Check.
02. **Direct Factory CFR / CIF Chattogram Quotation** (Within 12–24 Hours): We negotiate directly with vetted ISO-certified Chinese producers in Shandong, Jiangsu, Zhejiang, and Hebei to secure factory-direct CFR/CIF Chattogram or FOB pricing with zero middleman trader markup. Deliverables: Direct Factory Offer (USD/MT), 20ft FCL Net Loading Breakdown, Vessel Sailing & Transit Schedule.
03. **Zero-Discrepancy Proforma Invoice (PI) Issuance** (Instant Upon Price Confirmation): You receive an official Proforma Invoice directly on the Chinese Principal's letterhead, countersigned by Hafsa Sourcing, complete with mandatory Bangladesh Bank & NBR Customs clauses. Deliverables: 8-Digit BD Customs HS Code, Buyer IRC, BIN & TIN Endorsement, 14–21 Days Free Container Detention Clause.
04. **Irrevocable L/C Opening via Bangladeshi AD Bank** (L/C Draft Vetting Before Transmission): Open an Irrevocable L/C At Sight, Deferred / UPAS L/C (90–180 Days), or Back-to-Back L/C (for Bonded Warehouse export mills) through your Authorized Dealer (AD) bank in Bangladesh. Deliverables: Sight L/C or 90–180 Day UPAS L/C, Back-to-Back L/C (UD/Bonded Mills), Direct Chinese Advising Bank Swift Verification.
05. **Pre-Shipment QA, Container Stuffing & Vessel Loading** (7–10 Days Factory Dispatch): Before the container leaves Qingdao, Tianjin, Shanghai, or Ningbo, batch assay is verified against L/C specs, UN drum/bag markings (IRC/BIN/HS Code) are photographed, and optional SGS/BV/CCIC inspection is executed. Deliverables: Batch-Specific COA Verification, Container Stuffing & Seal Photos, Optional SGS / BV / Intertek PSI Report.
06. **Original Bank Docs & Smooth Chattogram Port Clearance** (12–18 Days Sea Transit to Chattogram): Zero-discrepancy shipping documents (Clean B/L, Commercial Invoice, Packing List, COA, MSDS, and CCPIT/APTA Certificate of Origin) are couriered to your bank ahead of vessel arrival at Chattogram Port. Deliverables: 3/3 Original Clean Bill of Lading, CCPIT / APTA Preferential COO, Zero Customs Assessment Delay.

---

## 6. Frequently Asked Questions (AEO / GEO Canonical Q&A)

### Q1: How does chemical indenting work in Bangladesh through Hafsa Sourcing?
Hafsa Sourcing operates as a B2B chemical indenting and manufacturer representation agency in Dhaka, Bangladesh. When a Bangladeshi textile mill, ETP operator, or chemical trading house needs bulk chemicals (1x20ft FCL or more), we connect them directly with vetted ISO-certified Chinese producers. The Proforma Invoice (PI) is issued directly by the Chinese manufacturer on CFR/CIF Chattogram terms so the buyer opens an L/C directly in favor of the factory—eliminating local middleman markups while we coordinate technical vetting, L/C compliance, and shipment execution for a transparent indenting commission.

### Q2: What is the Minimum Order Quantity (MOQ) for importing chemicals from China to Chattogram Port?
For direct L/C indenting of basic industrial and ETP chemicals (such as Caustic Soda 99%, Soda Ash, Sodium Sulphate, Hydrogen Peroxide 50%, Glacial Acetic Acid, PAC 30%, or SLES 70%), the standard MOQ is 1x20ft Full Container Load (FCL), which holds between 19.38 MT and 28.0 MT depending on packaging and cargo density. For high-value textile auxiliaries, enzymes, optical brighteners (OBA), and reactive/disperse dyestuffs, mixed-product 20ft FCL consolidation (2–4 compatible non-DG items from the same loading port) or 3–5 MT LCL trial lots can be arranged.

### Q3: What Letter of Credit (L/C) payment terms are accepted by your Chinese chemical principals?
Our Chinese manufacturing principals accept 100% Irrevocable L/C At Sight, Deferred / Usance Payable At Sight (UPAS L/C for 90, 120, or 180 days) issued by top-tier Bangladeshi Authorized Dealer (AD) banks, and Back-to-Back L/Cs opened by 100% export-oriented textile/apparel mills holding Customs Bonded Warehouse Licenses.

### Q4: What mandatory Bangladesh Bank & NBR Customs details must be included on a Chemical Proforma Invoice (PI) and Bill of Lading?
To prevent customs assessment delays or penalties at Chattogram Port, every Proforma Invoice (PI), Commercial Invoice, Packing List, and Bill of Lading (B/L) we process includes: (1) Exact 8-digit Bangladesh Customs Tariff HS Code, (2) Importer's Industrial or Commercial IRC Number, (3) 13-digit VAT BIN and TIN Number, (4) CAS Registry Number and exact purity assay matching the batch COA, (5) Country of Origin (China), and (6) 14 to 21 days free container detention clause at destination port.

### Q5: How are Dangerous Goods (DG) like Hydrogen Peroxide 50% and Sodium Hydrosulphite (Hydrose) handled at Chattogram Port?
Hazardous chemicals—specifically Hydrogen Peroxide 50% (IMO Class 5.1+8, UN 2014), Sodium Hydrosulphite / Hydrose 88–90% (IMO Class 4.2, UN 1384), Glacial Acetic Acid (Class 8+3, UN 2789), Formic Acid (Class 8+3, UN 1779), and Caustic Soda (Class 8, UN 1823)—are booked only on DG-certified feeder vessels with UN-approved packaging (vented HDPE drums or sealed 50kg steel drums), valid 16-section GHS MSDS, and early manifest filing so buyers holding Department of Explosives (DoEX) permissions can execute fast direct-delivery clearance under Chittagong Port Authority (CPA) DG directives.

### Q6: Can Bangladeshi importers claim China-Bangladesh APTA customs duty benefits on chemical imports?
Yes. For eligible tariff lines under the Asia-Pacific Trade Agreement (APTA) and China-Bangladesh preferential tariff schedules, our Chinese principals issue an official APTA Certificate of Origin (Form APTA) via CCPIT/China Customs alongside the regular COO, enabling Bangladeshi commercial and industrial importers to claim applicable customs duty rebates at assessment.

### Q7: Are your textile auxiliaries and dyestuffs ZDHC MRSL v3.1 and OEKO-TEX® Eco Passport compliant?
Yes. For 100% export-oriented knit, woven, and denim mills supplying European and US apparel brands (H&M, Inditex, Target, Marks & Spencer, C&A), we source ZDHC MRSL v3.1 (Level 1, 2, and 3) Gateway-registered and OEKO-TEX® Eco Passport certified textile auxiliaries, GOTS-approved enzymes, APEO/NPEO-free wetting agents, formaldehyde-free fixing agents (<16 ppm), low-D4/D5/D6 hydrophilic block silicones, and banned-amine-free (<20 ppm) reactive and disperse dyes.

### Q8: Why should textile mills or chemicalhouses source 60%–100% concentrated auxiliary mother liquors instead of ready-to-use (RTU) drums?
Importing ready-to-use textile auxiliaries means paying sea freight, drum packaging, and customs duty on 70%–85% water. By indenting high-concentration mother liquors—such as 99% AEO-9 scouring base, 70%–100% Hydrophilic Block Silicone Crude Oil, 100% Softener Flakes, or 65% Formaldehyde-Free Fixing Agent Concentrate—Bangladeshi mills and chemical formulators can dilute 1:4 to 1:10 locally with demineralized water, reducing landed raw material cost by 30%–45%.

### Q9: What is the typical sailing transit time from Chinese ports to Chattogram (Chittagong) Sea Port?
From Southern China (Guangzhou/Huangpu, Shenzhen/Shekou), transit time to Chattogram Port is 10–14 days. From Eastern China (Shanghai, Ningbo), sailing takes 12–15 days. From Northern China's bulk inorganic hubs (Qingdao in Shandong, Tianjin/Xingang in Hebei), sea transit takes 14–18 days via Singapore, Port Klang, or Tanjung Pelepas transshipment or direct China-Chittagong express feeders.

### Q10: Do you arrange Pre-Shipment Inspection (SGS, Bureau Veritas, Intertek, CCIC) before container departure?
Yes. Upon buyer request or L/C stipulation, we coordinate independent third-party Pre-Shipment Inspection (PSI) by SGS, Bureau Veritas (BV), Intertek, or CCIC at the Chinese factory or loading port to verify chemical purity assay, net weight, UN drum/bag integrity, shipping marks (IRC/BIN/HS Code), and container stuffing seal numbers prior to vessel boarding.

### Q11: Which ETP (Effluent Treatment Plant) chemicals do you supply for Bangladeshi dyeing and washing factories?
We supply the complete physico-chemical and biological ETP chemical stack in full container loads: Spray-Dried Poly Aluminium Chloride (PAC 28%–30% Al2O3), Cationic Textile Decolorizing Agent (CW-08 / Dicyandiamide Formaldehyde Polymer 50%), Anionic & Cationic Polyacrylamide Flocculants (PAM, 12–22 Million MW), Centrifuge-Dried Ferrous Sulphate Heptahydrate 98%, Caustic Soda Flakes 99%, Calcium Hypochlorite 70%, and Citric Acid.

### Q12: How can a Chinese chemical manufacturer appoint Hafsa Sourcing as their indenting agent in Bangladesh?
ISO-certified Chinese chemical producers and tier-1 export principals with competitive FOB/CFR pricing and consistent batch quality can apply via our "For Chinese Suppliers" portal (/for-suppliers). We provide active market representation across 1,500+ textile dyeing/washing mills in Gazipur, Narayanganj, Savar, and Chattogram, as well as wholesale chemical importers in Mitford (Old Dhaka) and Tejgaon.

---

## 7. Programmatic API & Contact Endpoints
- **GET Catalog JSON**: `https://hafsasourcing.com/api/chemicals`
- **POST Proforma / Indent RFQ**: `https://hafsasourcing.com/api/rfq`
- **POST Chinese Principal Application**: `https://hafsasourcing.com/api/supplier`
- **Email**: indent@hafsasourcing.com | info@hafsasourcing.com