Sodium metabisulfite
CAS Number7681-57-4
FormulaNa2S2O5
Mol. Weight190.11 g/mol
Sodium metabisulfite
What is Sodium metabisulfite?
Sodium metabisulfite is a chemical compound with CAS number 7681-57-4 and molecular formula Na2S2O5. It is used in various industrial and research applications.
Specifications
Linear Formula
Na2S2O5
Molecular Weight
190.11 g/mol
Grade
JIS first grade
Assay/Purity
≥97.0%
Impurities
≤0.005% insolubles
Safety Information
GHS05
GHS07Signal Word
Danger
Hazard Statements
H302-H318
Precautionary Statements
P280-P305 + P351 + P338
Required PPE
dust mask type N95 (US), Eyeshields, Gloves
Melting Point
>300 °C(lit.)
Anion Traces
chloride (Cl-): ≤0.05%
thiosulfate (S2O32-): ≤0.05%
Cation Traces
Fe: ≤0.002%
heavy metals (as Pb): ≤0.001%
EC Number
231-673-0
WGK Germany
1