Sodium Hyposulphite

Buy Sodium Hyposulphite from 250g, 1kg, 5kg packs up to 25kg bags. The price of the different formats of Sodium Hyposulphite can be seen when you select the format you want. The order is made directly through the Web following the steps indicated, . The delivery arround Europe is made in 4-5 days with UPS. In case you have any doubt please contact us.

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Sodium hyposulphite, nowadays called sodium thiosulphateformerly an inorganic crystalline compound with the formula Na2S2O3-5H2O. Sodium hyposulphite is a white crystalline solid. It is very soluble in water and in turpentine oil. Its main use is as a fixing agent in photography, for film development and extraction of silver from its ores. Sodium hyposulphite is also used for chlorine separation in bleaching and paper making in chemical manufacturing, as a source of sulphide ion, industrial treatments of paper, textiles, water bleaching, chromium dye, salt sequestrant. Buy Sodium Hyposulphite in different formats.


Name: Sodium hyposulphite
Synonyms: Sodium thiosulphate
Chemical formula: Na2S2O3-5H2O
CAS: 7772-98-7
EC: 231-867-5

  • Appearance: White crystalline solid
  • pH: 6.5-9.5 (20%)
  • Flammability (solid,gas): No
  • Relative density: 1.729 gr/cm3
  • Melting point: 48ºC
  • Water solubility: Soluble


  • Fixing agent in photography
  • Film development
  • Extraction of silver from its ores





















Product Ref. Document
Sodium Hyposulphite ALQ0043 Material Safety Data Sheet MSDS:    EN          &nbsp  
Sodium Hyposulphite ALQ0043 Technical specifications
You can also see the Material Safety Data Sheets (MSDS) of all products in this section: MSDS
Weight 1 kg
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