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13459 Sigma-Aldrich

Sodium metabisulfite

puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E223, dry, 97-100.5%

Synonym: Sodium disulfite, Sodium pyrosulfite

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Properties

Related Categories Chemical Synthesis, Essential Chemicals, Inorganic Salts, Research Essentials, Salts,
InChI Key   HRZFUMHJMZEROT-UHFFFAOYSA-L
grade   puriss.
assay   65.0-67.4% SO2 basis
  97-100.5%
quality   dry
  meets analytical specification of Ph. Eur., BP, NF, FCC, E223
impurities   residue of solvents, complies
  ≤0.02% thiosulfate (S2O3)
pH   3.5-5.0 (20 °C, 5%)
mp   >300 °C (lit.)
anion traces   chloride (Cl-): ≤100 mg/kg
cation traces   As: ≤2 mg/kg
  Cu: ≤10 mg/kg
  Fe: ≤10 mg/kg
  Hg: ≤1 mg/kg
  Pb: ≤2 mg/kg
  Se: ≤5 mg/kg
  Zn: ≤10 mg/kg
suitability   complies for appearance of solution

Description

General description

Sodium metabisulfite (MBS, Sodium disulfite) is an inorganic salt. It is the sodium salt of disulphurous (pyrosulfurous) acid. It is widely used as reducing agent in textile and photography industry. It is commonly added to various foods and wines as preservative.

Application

Sodium metabisulfite was used to initiate the cross-linking of polybutadiene in the cores of the vesicle membranes by free radical polymerization in solution. It has been used to prevent the oxidation (as antioxidant) during the preparation of stock solutions of 6-hydroxydopamine in various studies.

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
Supplemental Hazard Statements 
Contact with acids liberates toxic gas.
RIDADR 
NONH for all modes of transport
WGK Germany 
1
RTECS 
UX8225000

Documents

Certificate of Analysis

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Protocols & Articles
Peer-Reviewed Papers
15

References

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