Sodium Metabisulfite

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CAS NO.： 7681-57-4

FOB Price： NEGOTIABLE Get Latest Price

Specification： ≥96.5%

Documentation：

COA

Lead Time： 14-30 days

Max Capacity： -

Packing： 25KG/Woven Bag

Product Detail

Properties

Sodium metabisulfite For food grade

Item	Chinese standard GB1893-2008	Company standard
Main content(Na₂S₂O₅)	≥96.5	≥97.5
Fe(As content Fe)	≤0.003	≤0.0015
Clarity	Pass test	Clear
Heavy metal content (Pb)	≤0.0005	≤0.0002
Arsenic content (As)	≤0.0001	≤0.0001

Properties

It is used as preservative, bleach and loosening agent in food processing. In industry, sodium pyrosulfite is used in printing and dyeing, organic synthesis, printing, tanning, pharmaceutical and other departments; Sodium pyrosulfite is used in the chemical and pharmaceutical industries for the production of insurance powder, sulfamethazine, analgin, caprolactam, etc., as well as the purification of chloroform, phenylpropanesulfone and benzene formaldehyde. The photographic industry is used as an ingredient for fixing agents. Perfume industry is used to produce vanillin. It is used as preservative in brewing industry, rubber coagulant and dechlorination agent after cotton bleaching. Organic intermediates, dyes and tanning are used as reducing agents, electroplating industry, oilfield wastewater treatment and mineral dressing agent in mines.

CAS No.

7681-57-4

Formula

Na2O5S2

Molecular Mass

190.10700

Exact Mass

189.89800

PSA

124.92000

Logp

0.27220