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Sodium Metabisulphite

  • CAS 7681-57-4
  • Molar weight 190.095g/mol
  • Chemical formula Na2S2O5

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.

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Sodium Metabisulphite
  • CAS 7681-57-4
  • Chemical formula Na2S2O5
  • Molar weight 190.095g/mol

Product details of Sodium Metabisulphite

  • Food
  • Technical
  • USP
  • Mining

  • Solution
  • White to yellow powder

Chemical formula


CAS number


Molar weight


Specific Gravity

1.310 – 1.370

Melting Point

170 °C


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

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