| Customization: | Available |
|---|---|
| CAS No.: | 7681-57-4 |
| Formula: | Na2s2o5 |
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1. Chemical Name: sodium metabisulfite
2. Molecular Formula: Na2S2O5
3. Molecular Weight: 190.107
4. CAS: 7681-57-4
5. EINECS: 231-673-0
6. Expiration: 24 months
7. Character: It is white or yellow crystalline powder or small crystal, with a strong smell of sulfuric acid, soluble in water. The aqueous solution is acidic. When it contacts with strong acid, it releases sulfuric acid and generates the corresponding salts. Keeping in air, it oxidizes to Na2S2O6, so the product cannot be stored for a long time. It is higher than 150 degrees Celsius, that is to decompose sulfuric acid.
8. Usages: It is used as preservative, bleaching agent, and swelling agent in food processing.
| Test item | Standard |
| Assay(Na2S2O5) ≥% | 96.5 |
| Iron(Fe) ≤% | 0.003 |
| Clarity | Passes test |
| As ≤mg/kg | 1.0 |
| Heavy metals(as Pb) ≤mg/kg | 5.0 |
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A: The listed price is only for reference, for latest price, please contact us directly.
4. What is your delivery time?
A: 3-5 working days normally and it depends on your quantity and our stock.
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6. Where is your loading port?
A: Lianyungang, Qingdao, Shanghai, Ningbo and other China main ports.
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A: Welcome to visit our factory at your convenience.
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