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sodium metabisulfite

Sodium metabisulfite (Na2S2O5) is used as an antioxidant and antimicrobial agent in a variety of drugs and functions as a preservative in many food preparations.PubChem CID : 656671Structure : Find Similar StructuresMolecular Weight : 190.11 g/molMolecular Formula : Na2S2O5 or Na2O5S2

Chemical structure

The anion metabisulfite consists of an SO2 group linked to an SO3 group, with the negative charge more localised on the SO3 end. The S–S bond length is 2.22 Å, and the “thionate” and “thionite” S–O distances are 1.46 and 1.50 Å, respectively.

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