Product Name: Sodium Bisulfite
CAS No: 7631-90-5
Einecs No: 231-548-0
HS Code: 2832100000
Formula: NaHSO3
Grade Standard: Food Grade, Tech Grade
Appearance: White to yellowish crystalline powder
Packaging Details: 25KG/BAG, 1000KG/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 |
|---|---|---|---|---|
| Content (as SO₂) | – | ω/% | 64.0–67.0 | 58.5–67.4 |
| Water insoluble | ≤ | ω/% | 0.03 | 0.01 |
| Chloride (as Cl) | ≤ | ω/% | 0.05 | – |
| Iron (Fe) | ≤ | ω/% | 0.004 | 0.005 |
| Arsenic (As) | ≤ | ω/% | 0.0002 | 0.0002 |
| Heavy metals (as Pb) | ≤ | ω/% | 0.001 | 0.0005 |
| pH (50g/L solution) | – | ω/% | 4.0–5.0 | – |
| Heavy metal (Pb) | ≤ | ω/% | – | 0.0002 |
| Selenium (Se) | ≤ | ω/% | – | 0.0005 |
