Sodium Persulphate

Sodium persulfate is the sodium salt of peroxydisulfuric acid, H2S2O8, an oxidizing agent. It is a white solid that dissolves in water. It is almost non-hygroscopic and has good shelf-life. The salt is prepared by the electrolytic oxidation of sodium hydrogen sulfate.


Molar Weight238.11 g/mol
Melting Point180°C (decomposes)
Flash Pointnon flammable
Density2.59 g/cm³
FormsPowder, White

Uses and Applications

Key applications

  • Oxidising agent
  • Etching & Engraving
  • Bleaching agent


  • Polymers
  • Cleaning
  • Coatings & Construction
  • Cosmetics

Synonyms: Sodium peroxodisulphate, Sodium peroxydisulphate, Disodium peroxodisulphate, disodium {[(oxidooxy)sulfonyl]oxy}sulfonate

Chemical Formula: Na2S2O8

CAS Number: 7775-27-1