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.

IDENTIFICATION AND PROPERTIES

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

HYPOSULPHITE USES

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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