Sodium Metabisulphite 97% (SMBS)
High-SO2 content (≥65%) Sodium Metabisulphite 97% for denim chlorine bleaching neutralization (anti-chlor), RO membrane dechlorination, and ETP hexavalent chromium reduction.
Typical Certificate of Analysis (COA) — Sodium Metabisulphite 97% (SMBS)
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 Metabisulphite (Na2S2O5) | ≥ 97.0% | 97.6% | HG/T 2826-2008 |
| Sulphur Dioxide (SO2) Equivalent | ≥ 65.0% | 65.7% | HG/T 2826-2008 |
| Water Insoluble Matter | ≤ 0.05% | 0.02% | HG/T 2826-2008 |
| Iron (Fe) Content | ≤ 0.005% | 0.002% | HG/T 2826-2008 |
| pH Value (1% Aqueous Solution) | 4.0 – 4.6 | 4.3 | HG/T 2826-2008 |
Industrial Applications in Bangladesh
Bangladesh Market Context: Heavily used across Dhaka and Gazipur denim washing plants after hypochlorite bleaching, as well as in reverse osmosis (RO) water treatment plants and Savar tanneries.
- 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
Import & L/C Indenting Parameters
- Standard Export Packaging
- 25kg PP Woven Bags with PE Inner Liner
- 20ft FCL Container Payload
- 25.0 – 27.0 MT (1,000–1,080 × 25kg Bags per 20ft FCL)
- Chinese Production Hub
- Shandong / Hunan, China
- Bangladesh Customs & Regulatory Note
- Classified under HS Code 2832.10.00; specify Industrial vs Food Grade on PI.
- Trade Synonyms
- SMBS 97% • Sodium Metabisulfite • Anti-Chlor 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).