Sodium Thiosulphate USP

Sodium Thiosulphate also known as sodium hyposulphite is an efflorescent crystalline substance that dissolves readily in water. It occurs in the anhydrous and pentahydrate forms.


It is used as a photographic fixer for both film and photographic paper processing. It is also used as a neutralizing bleach to dechlorinate tap water, as a component in hand warmers and other chemical heating pads, in the tanning of leather, in pharmaceutical preparations as an anionic surfactant and as an antidote to cyanide poisoning.


Chemical Name: Sodium Thiosulphate
Synonyms: Sodium Hyposulphite
Mol. Formula: Na2S2O3.5H2O
Mol. Weight: 248.19 g/mol
CAS No.: 10102-17-7


General Specifications

Test Specification
Appearance It appears as transparent crystals or pellets
Solubility Freely soluble in water
Appearance of solution The solution is clear and colorless
Water Between 32% and 37%
Calcium Passes test
Heavy metals Maximum 0.002%
Residual solvents Meets the requirements
Assay Not less than 99% and not more than 100.5%


Shelf life, Storage and Packing

It should be stored in a segregated area in a cool and ventilated place away from combustible materials. Keep in a tightly closed container, sealed until ready for use. It is packed in 25kg or 50kg HDPE bags or drums as required.


GLP, cGMP (FDA) Approved, ISO 9001, ISO 14001, ISO 45001, ISO 17025, ISO 22000, FSSC 22000, FSSAI, Halal and Kosher certified.
We observe WHO Good manufacturing practice and Good laboratory practice.

    Product Enquiry