Sodium metabisulfite

grade

ACS reagent

Assay

≥97.0%

impurities

≤0.005% Insoluble matter

mp

>300 °C (lit.)

anion traces

chloride (Cl^–): ≤0.05%
thiosulfate (S₂O₃^2-): ≤0.05%

cation traces

Fe: ≤0.002%
heavy metals (as Pb): ≤0.001%

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