SODIUM BISULFITE
CAS NO. 7631-90-5
Molecular formula: NaHSO3
Molecular weight: 104.07
Characteristic: clear monoclinic crystal or white crystalline powder; sulfa dioxide odor; specific density: 1.48; dissociate upon heating; water soluble; acidic aqueous solution; slightly soluble in alcohol; readily oxidized into sodium sulfate in air; strongly reductive; form adduct with formaldehyde; storage: tightly sealed and avoid light.
Specifications:
| Item |
Standard |
| Purity (in SO2) |
65%min |
| pH (5% aqueous solution) |
4.0-4.5 |
| Water insoluble substance |
0.02%max |
| Fe |
0.01%max |
| Heavy metal(as Pb) |
0.02%max |
Package: 25/50kg N.W. in knitted bag lined with PVC bag
Application:
in photographic developer, preservative for food, electrobath for electroplating of copper; for bleaching of organic products, chemical synthesis etc.; as reductant ; in pesticide etc.
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