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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.
  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
SMILES string   [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O
InChI   1S/2Na.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
InChI key   HRZFUMHJMZEROT-UHFFFAOYSA-L

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 in textile dyeing, photography and paper industry. It is also commonly added to various food products and wines as a preservative.

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.

Packaging

1, 2.5, 6×2.5 kg in poly bottle

500 g in poly bottle

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
Supplemental Hazard Statements 
EUH031
RIDADR 
NONH for all modes of transport
WGK Germany 
WGK 1
RTECS 
UX8225000
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Single- & multi-channel pipettes from BRAND
Protocols & Articles
Peer-Reviewed Papers
15

References

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