| CAS No.: | 7681-57-4 |
|---|---|
| Formula: | Na2s2o5 |
| EINECS: | 231-673-0 |
|
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Component |
Industrial Grade |
Food Grade |
High Purity Grade |
|
Appearance |
White or yellowish crystalline powder |
||
|
Assay(Na2S2O5 ) |
96.5%min |
97%min |
98%min |
|
water insoluble matter |
0.05%max |
0.03%max |
0.02%max |
|
Iron content(Fe) |
0.005%max |
0.003%max |
0.002%max |
|
As content(As) |
0.0001%max |
0.0001%max |
0.0001%max |
|
Pb |
0.0005%max |
0.0005%max |
0.0003%max |
Chemical industry
It is used for the production of insurance powder, sulfamethazine, analgin, caprolactam, etc., phenylpropane sulfone and benzaldehyde. The photographic industry is used as a fixative for the fixer. The perfume industry is used to produce vanillin. Used as a preservative for brewing industry, a rubber coagulant and a bleaching agent for cotton bleaching. Organic intermediates, dyes, and tanning are used as reducing agents for electroplating, wastewater treatment in oil fields, and as a mineralizer for mines.
industry
It is used in printing and dyeing, organic synthesis, printing, tanning, pharmaceutical and other departments; as a preservative, bleaching agent and loosening agent in food processing.
Used as a chemical reagent
(Printing and dyeing, photography, etc.), used as bleach mordant, reducing agent rubber coagulant, also used in organic synthetic pharmaceuticals and spices.
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