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SODIUM METABISULPHITE
CAS NO.: 7681-57-4
Molecular Formula: Na2S2O5
Molecule Weight: 190.10
How to buy SODIUM METABISULPHITE？
Appearance： White or light yellow crystalline powder.
Specification :
| Item |
Standard |
| Purity (calculated with Na2S2O5) |
97%min |
| Iron (Fe) |
0.0005%max |
| Arsenic (As) |
0.0002%max |
| PH value |
4.0-4.6 |
| Water insoluble matter |
0.05%max |
| Heavy metal(as Pb) |
0.002%max |
Package: 25kg net in PP bags with PE liner, or 1000kg net in ton bag
Application：
The pharmaceutical industry: produce chloroform, phenylpropyl sulfone and benzaldehyde.
The rubber industry: can be used as a coagulant.
The printing and dyeing: a dechlorination agent and cotton scouring agent after cotton bleaching.
The tannery industry: can be used for leather treatment, which enables the leather turns soft, plump and tough, with waterproof, anti-folding and abrasion resistance.
The chemical industry: produce hydroxy vanillin, hydroxylamine hydrochloride, etc.
The photosensitive industry: serves as a developer or the like.
The food industry: a bleaching agent, preservative, bulking agent, antioxidant, color protectant and preservative.
 
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