Sodium Hydrosulphite 88% / 90% (Hydrose)
High-stability sodium formate-process Sodium Hydrosulphite (Hydrose) 88%/90% in hermetically sealed 50kg iron drums for denim indigo vat dyeing and reactive reduction clearing.
Typical Certificate of Analysis (COA) — Sodium Hydrosulphite 88% / 90% (Hydrose)
Every container indented by Hafsa Sourcing is accompanied by a batch-specific factory Certificate of Analysis (COA) and optional SGS / Bureau Veritas Pre-Shipment Inspection report verifying the parameters below:
| Test Parameter | Export Spec Limit | Typical Batch Value | Test Method |
|---|---|---|---|
| Sodium Hydrosulphite (Na2S2O4) | ≥ 88.0% / ≥ 90.0% | 88.6% / 90.4% | HG/T 2074-2011 |
| Insoluble Matter in Water | ≤ 0.05% | 0.02% | HG/T 2074-2011 |
| Iron (Fe) Content | ≤ 20 ppm | 11 ppm | HG/T 2074-2011 |
| Heavy Metals (as Pb) | ≤ 10 ppm (Zinc-Free) | < 5 ppm | HG/T 2074-2011 |
Industrial Applications in Bangladesh
Bangladesh Market Context: Indispensable reducing agent for Bangladesh's massive denim rope/slasher dyeing sector (converting insoluble Indigo into soluble Leuco-Indigo) and polyester/cotton reduction clearing.
- 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
Import & L/C Indenting Parameters
- Standard Export Packaging
- 50kg New Sealed Iron Drums with Double PE Inner Liners
- 20ft FCL Container Payload
- 20.0 – 22.0 MT (400–440 × 50kg Iron Drums per 20ft FCL)
- Chinese Production Hub
- Guangdong / Shandong / Hubei, China
- Bangladesh Customs & Regulatory Note
- Strict CPA DG Yard & DoEX clearance rules apply at Chattogram Port; shipped exclusively in UN-approved 50kg steel drums.
- Trade Synonyms
- Hydrose • Sodium Hydrosulfite • Blankit • Vat Reducing Agent
Other Basic Inorganic & Alkalis Sourced from China
Caustic Soda Flakes / Pearls 99%
High-purity 99% membrane-cell Sodium Hydroxide flakes and pearls sourced directly from top Chinese chlor-alkali plants for cotton mercerizing, reactive dyeing, soap manufacturing, and ETP neutralization.
Hydrogen Peroxide 50% (Textile & Industrial Grade)
Anthraquinone-process 50% Hydrogen Peroxide with low heavy-metal trace and ≥97% thermal stability for high-whiteness cotton knit/woven bleaching and pulp processing.
Soda Ash Light & Dense 99.2%
Premium Chinese synthetic and natural-trona Sodium Carbonate in Light Grade (reactive dye fixation & detergents) and Dense Grade (float glass, container glass & sodium silicate).