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31448 Sigma-Aldrich

Sodium metabisulfite

puriss. p.a., ACS reagent, reag. Ph. Eur., dry, 98-100.5%

Synonym: Sodium disulfite, Sodium pyrosulfite

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Properties

Related Categories Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography, Essential Chemicals, Puriss p.a. ACS,
grade   ACS reagent, reag. Ph. Eur.
InChI Key   HRZFUMHJMZEROT-UHFFFAOYSA-L
grade   puriss. p.a.
assay   98-100.5%
quality   dry
impurities   ≤0.01% thiosulfate (S2O3)
pH   3.5-5.0 (20 °C, 5%)
mp   >300 °C (lit.)
anion traces   chloride (Cl-): ≤50 mg/kg
cation traces   As: ≤0.5 mg/kg
  Ca: ≤50 mg/kg
  Cd: ≤50 mg/kg
  Co: ≤50 mg/kg
  Cu: ≤5 mg/kg
  Fe: ≤5 mg/kg
  K: ≤100 mg/kg
  Ni: ≤50 mg/kg
  Pb: ≤5 mg/kg
  Zn: ≤10 mg/kg

Description

Packaging

1, 2.5, 6×2.5 kg in poly bottle

500 g in poly bottle

Application

Sodium metabisulfite may be used as an initiator during the cross-linking polymerization of polybutadiene in the cores of the vesicle membranes. It may be added as an antioxidant during the preparation of stock solutions of 6-hydroxydopamine in various studies.

General description

Sodium metabisulfite (MBS, Sodium disulfite) is an inorganic salt. It is the sodium salt of disulphurous (pyrosulfurous) acid. It is widely used in textile dyeing, photography and paper industry. It is also commonly added to various food products and wines as a preservative.

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

Certificate of Origin

Protocols & Articles
Peer-Reviewed Papers
15

References

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