Sodium Metabisulphite

Sodium Metabisulphite, also known as Sodium Pyrosulphite, or Sodium Disulphite. It is a sodium salt, used in the food industry with the code: E 223. It has three possible functions: disinfectant, antioxidant and preservative.

IDENTIFICATION AND PROPERTIES

Name: Sodium metabisulphite
Synonyms: Sodium pyrosulphite, sodium bisulphite, sodium disulphite
CAS: 7681-57-4
EC: 231-673-0

• • Physical state: Solid
  • Colour: White
  • Odour: Characteristic
  • Melting point: 150ºC
  • Flammability: Non-flammable
  • Decomposition temperature: 150ºC
  • Solubility: Soluble in water
  • Water solubility: 470 kg/m3
  • Partition coefficient (n-octanol/water) (logarithmic value): -3,7
  • Relative density: 1.0-1.2

USES

• • Laboratory
  • Various industrial uses
  • Food additive