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(Sodium metabisulfite is an antioxidant reducing agent, with antimicrobial and antifungal properties. Gastric tissue studies report that sodium metabisulfite can augment lipid peroxidation and apoptosis in a dose-dependent manner.)
S 2097 (OTTO) Sodium metabisulphite, GR 98%+ Cas 7681-57-4 - used in photography.