Name: Sodium thiosulphate
Synonyms: thiosulphate = STS, sodium thiosulfate, antichlor
Purity: Pure without admixtures
Chemical formula: Na2S2O3 • 5H2O
Sodium thiosulphate (or thiosulphate = STS) is an antioxidant, fungicide and heavy metal chelator. It is used in poisoning with cyanide and other toxic substances. It dissolves soft tissue calcification and removes excess calcium in appropriate amounts.
In traditional photography, this compound is used as a fixative, because it forms stable complexes with silver ions, thereby removing the unexposed silver bromide from the plate upon induction.
It is often used in chemical analysis (iodometry), in photography, analytics and used for effective experiments. It is one of the antidotes for potassium cyanide.
Form: white, odorless, crystalline solid (pentahydrate)
Chemical formula: Na2S2O3 * 5H2O
Melting point: 48.5 ° C
Sodium thiosulphate is used as an agent in the neutralization of chlorine and iodine solutions in water reservoirs, ponds, aquariums. Chlorine is a toxic element, and excess chlorine can be harmful to fish and crustaceans, hence it is important to remove chlorine by disinfecting tanks and equipment with sodium thiosulphate.
Hydrated sodium thiosulphate (Na2S2O3 x 5H2O) melts to "crystalline water" at 48 ° C, and after melting it turns into a subcooled liquid state and therefore due to dropping a sodium thiosulphate crystal or a sudden impulse (impact) begins to crystallize with separation heat (at about 45 ° C) this phenomenon has been used in chemical heaters.
It is a chelating agent and has many uses in the removal of toxic substances from the body.
Sodium thiosulphate is used for fungal infections. It is added to the water in shower trays, bathtubs, shower cabins to get rid of ringworm. With dandruff dandruff, sodium thiosulphate is often combined with salicylic acid in a formulation that is applied topically to the affected areas.