Product Description
Product Name : Sodium Metabisulphite
Another Name: Sodium Pyrosulfite, Sodium metabisulfite
Grade : First Grade
Executive standard: GBl983-2008
Molecular Formula: Na2S2O5
Molecular Weight: 190.10
Cas No.: 7681-57-4
EC No.: 231-673-0
Package: Inner bag: PE plastic bag, Outer bag: woven bag Net weight:25kg
Storage: please store in cool, dry and ventilated warehouse, seperate from acid, oxidizing agent and toxic products, please pay attention to rain, moisture and sunshine
Product Quality Standard
Item | First Grade |
Appearance | White or yellowish crystal powder |
Contentn(Na2S2O5), w/% | ≥ 96.0% |
Iron, w/% | ≤ 0.003 |
Water Insoluble Matter, w/% | ≤ 0.03 |
Arsenic, mg/kg | ≤ 0.5 |
Clarity | Slightly turbid |
Heavy metal(Pb), mg/kg | ≤ 3.0 |
Chloridion(Cl), mg/kg | ≤ 0.1 |
Uses
1. Used in the production of insurance powder, sulfamethazine, metamizole, caprolactam, etc.
2. Used for the purification of chloroform, phenylpropyl sulfone and benzaldehyde.
3. Ingredients used as fixatives in the photographic industry.
4. Used in the fragrance industry to produce vanillin.
5. Used as a preservative in the brewing industry.
6. Dechlorinating agent for rubber coagulant and cotton cloth bleaching.
7. Organic intermediates; used in printing, dyeing and tanning.
8. Used as reducing agent.
9. Used as wastewater treatment in the electroplating industry, oil fields, and mineral processing agents in mines.
10. Used as preservative, bleaching agent and loosening agent in food processing.