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  • sodium metabisulfite
  • sodium metabisulfite
  • sodium metabisulfite
  • sodium metabisulfite
Sodium Metabisulfite
Name : Sodium Metabisulfite (SMBS)
Synonyms: Sodium pyrosulfite; Disodium disulphite; Sodium metabisulphite; Sodium disulphite; Sodium pyrosulphite
MF: Na2S2O5
CAS NO.: 7681-57-4
Appearance(25℃): White or yellowish crystalline powder
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OverviewTechnical Data Inquiry

【Performance and Application】
It is white or tiny yellow crystal powder. It can solute in glycerine and little in alcohol. When exposed in air, it will oxidized into sodium sulfate, and can react with strong acid into sulfur dioxide gas and the salts. It is deliquescent, and will decompose when heated to 150°C.

1. Used for manufacturing trichloromethane, sulphetrone and benzaldohyde in medicine industry.
2. Used as coagulative agent in rubber industry.
3. Used as dechlorination agent and cotton boiling-off agent for bleached cotton in dye-industry: 
4.Make leather soft, well-developed, tough water proof, wear-ability in leather industry
5. Used for manufacturing hydrochloride hydroxylamine in Chemical industry. 
6. Light-sensitive industry: Used as developer and others.
7. Flotation reagent,mining industry chemicals

【Package】
25/50/1000KGS plastic woven bag or as per customers’ required.

【Storage】
Stored in cool and dry place, aovid moisture and heat. No breakage, No mixed with oxidant and toxic matter. The storage period is 6 month since the production date. It should be transported by clean car, with covering matter, avoid raining.
【Technical Data】
Items food grade technical grade
Purity (Na2S2O5), %≥ 98.0 97.0
Sulfur dioxide ( SO2), %≥ 65.0 65.0
Arsenic (As), %≤ 0.0002 -
Heavy metal (Pb), %≤ 0.0005 -
Selenium (Se ), %≤ 0.0005 -
Iron (Fe), %≤ 0.001 0.002
Water insoluble matter, %≤ 0.02 0.05
pH-value 4.0-4.8 4.0-4.8

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