| CAS No.: | 7681-57-4 |
|---|---|
| Formula: | Na2s2o5 |
| EINECS: | 231-673-0 |
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Sodium metabisulfite cas 7681-57-4 specification
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ITEM
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TEST RESULT
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Sodium Metabisulphite (Na2S2O5) %
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97.21
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SO2 % ≥
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65
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Fe % ≤
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0.002
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Clarity
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clear
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Insoluble matter in NA ≤
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0.009
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AS%
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<0.00009
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PA test ≤
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4.2
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Appearance
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White to slightly yellowish
crystialline powder |
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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