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Sodium metabisulfite CAS 7681-57-4
Sodium metabisulfite CAS 7681-57-4 or sodium pyrosulfite (sodium metabisulphite or sodium pyrosulphite) is an inorganic compound of chemical formula Na2S2O5. The substance is sometimes referred to as disodium (metabisulfite). It is used as a disinfectant, antioxidant and preservative agent. Sodium metabisulfite is white or light-yellow crystalline powder, smell of SO2.
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