What is 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.

  • INCI: Sodium Metabisulphite
  • Chemical Formula: Na2S2O5
  • CAS Number: 7681-57-4

Product Specifications

Chemical Formula Na2S2O5
CAS Number 7681-57-4
Molar Weight 190.095g/mol
Specific Gravity 1.310 – 1.370
Melting Point 170 °C
Forms Solution White to yellow powder
Grades Food Technical Feed

Uses and Applications for Sodium Metabisulphite

Key Applications

  • Building and construction materials
  • Cleaning and furnishing care products
  • Fabric, textile and leather products
  • Laundry and dish washing products
  • Metal products
  • Photographic supplies, film and photo chemicals
  • Solvents (cleaning and degreasing)
  • Water treatment products


  • Coatings & Construction
  • Water Treatment
  • Cleaning
  • Pharma
  • Lubricants
  • Food and Nutrition
  • Cosmetics
  • Agriculture
  • Solvents
  • Animal Nutrition
  • Polymers
  • Oil & Gas
  • Rubber

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