Characteristic

Ammonium thiosulfate (ammonium thiosulphate in British English) is an inorganic compound with the formula (NH₄)₂S₂O₃. It is white crystalline solid with ammonia odor, readily soluble in water, slightly soluble in acetone and insoluble in ethanol and diethyl ether.

Chemical formula:(NH₄)₂S₂O₃

Formula weight: 148.20g/mol

Appearance: White cryst powder

Melting Point: ca 180°C

Density 1.64g/ml

Sensitivity: Store under Nitrogen. Hygroscopic. Ambient temperatures.

Solubility: Soluble in water, slightly soluble in acetone. Insoluble in ethanol and diethyl ether.

Application

Ammonium thiosulfate finds application for leaching of gold and silver since it forms strong complexes. It is widely utilized as a photographic fixing agent, which acts quicklier than sodium thiosulfate fixers. It serves as a fertilizer. It acts as an additive to coal-waste mixtures to inhibit the formation of dangerous dioxins and furans. It is used as an analytical reagent in laboratories.