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The aqueous solutions of sodium bisulfite are acidic in nature. Degradation of sodium bisulfite with acid forms sulfur dioxide gas.
Sodium bisulfite is a widely used industrial chemical as a reducing agent, catalyst, and preservative in pharmaceuticals and foods due to its antioxidative and antibacterial effects.
grade
ACS reagent
Quality Segment
form
powder or crystals
concentration
≥58.5% SO2
impurities
≤0.005% insolubles
pH
4.3 (10 g/L)
anion traces
chloride (Cl-): ≤0.02%
cation traces
Fe: ≤0.002%, heavy metals (as Pb): ≤0.001%
SMILES string
[Na+].OS([O-])=O
InChI
1S/Na.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+1;/p-2
InChI key
DWAQJAXMDSEUJJ-UHFFFAOYSA-L
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