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Sodium Metabisulfite

Sodium Metabisulfite
Product Description

Sodium metabisulfite or sodium pyrosulfite (IUPAC spelling; Br. E. 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 disinfectantantioxidant, and preservative agent.\

It is used as a preservative and antioxidant in food and is also known as E223.[4]

It may cause allergic reactions in those who are sensitive to sulfites, including respiratory reactions in asthmaticsanaphylaxis, and other allergic reactions in sensitive individuals

The anion metabisulfite is a hybrid of dithionite (S2O42−) and dithionate (S2O62−). The anion consists of an SO2 group linked to an SO3group, with the negative charge more localized on the SO3 end. The S–S bond length is 2.22 Ã…, and the "thionate" and "thionite" S–O distances are 1.46 and 1.50 Ã… respectively.[3]


Technical Information:
  • Molecular Formula : Na2S2O5
  • CAS No. : 7681-57-4
  • Accurate compositions

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