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Sodium Metabisulfite
CAS No.:7681-57-4
Synonyms: Sodium metabisulfite; Disulfurous acid, disodium salt; Sodium Metabisulfite [USAN]; Disodium disulphite; Pyrosulfurous acid, disodium salt
Description: white or slightly yellowish crystalline powder
Specification:
| Technical Grade |
| Na2S2O5 |
≥96% |
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Iron(Fe)
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≤50ppm
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water insolubles
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≤ 0.05%
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Arsenic(As)
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≤ 1ppm
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| Food Grade |
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Na2S2O5
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≥ 96.5%(SO2 ≥65%)
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Iron(Fe)
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≤50ppm
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Solution appearance
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slightly cloudy
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Arsenic(As)
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≤1ppm
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Heavy metal(as Pb)
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≤10ppm
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Uses: bleaching agent for textile fibres;Colors stripper and dechlorination; preparation of Indigo Vat Dye;solubilizing and acidyfing agent for leather industries ;bleaching agent for paper pulps;preservative and sterilisation agent for food industries
Packing : 25kg compound plastic woven bag with inner polythene liner
Storage: Store the product in a cool and dry place ; prevent from direct sunlight , water and moisture ; avoid contact with strong acid,oxidants or poisonous substances ? Exposure to moisture will make it oxidze easily to sodium sulphate.Do not store it for long time
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