Sodium Metabisulphite

It is used as a preservative and antioxidant in food. It is used as a cleaning agent for potable water desalination systems and used to remove chloramine from drinking water after treatment.

Synonyms
Disodium Pyrosulfite, E 223, SMBS, Sodium Bisulfite Anhydrous, Sodium Disulfite, Sodium Hydrogen Sulfite, Sodium Pyrosulfite
Chemical Formula
Na2S2O5
CAS Number
7681-57-4

Characteristics

Molar Weight
190.095 g/mol
Melting Point
170 °C
Density
1.310 – 1.370 g/cc
Forms
Powder, White, Yellow

Uses and Applications

Key applications

  • Hair care
  • Fabric, textile and leather products
  • Water treatment
  • Cleaning products
  • Preservative
  • Wine production
  • Pharmaceuticals
  • Laundry products
  • Building & Construction products