Product Name: Sodium Metabisulfite
CAS No: 7681-57-4
Einecs No: 231-673-0
HS Code: 2832100000
Formula: Na2S2O5
Grade Standard: Food Grade, Tech Grade
Appearance: White to yellowish crystalline powder
Packaging Details: 25KG/BAG, 1000KG/BAG, 1250KG/BAG
Application:
Mining Industry: Floating agent, depressant.
Food & Beverage Industry: Preservative, loosening agents, Antiseptic fungicides.
Water treatment: Removing excess Chlorine.
Pulp & Paper and Textile: Bleaching Agent, Anti chlor and anti peroxides, making sulphite pulp.
Tanneries: Auxiliary in decalcification & Bleaching Process.
Rubber Production: Preservative & Bleaching agent.
Photographic Industry: Production of developer Solution / Acidizing Fixation Baths
Specification:
| Item | Range | Unit | Tech grade | Food grade |
|---|---|---|---|---|
| Purity (as Na₂S₂O₅) | ≥ | ω/% | 96.5 | 96.5 |
| Water insoluble | ≤ | ω/% | 0.05 | – |
| Iron (Fe) | ≤ | ω/% | 0.005 | 0.003 |
| Clarity | – | – | – | Pass test |
| Arsenic (As) | ≤ | ω/% | 0.0001 | 0.0001 |
| Heavy metals (as Pb) | ≤ | ω/% | – | 0.005 |
