Sodium thiophosphate hydrate (Na3PO3S•xH2O)-Crystalline

Characteristic

 

Sodium monothiophosphate, or sodium phosphorothioate, is a inorganic compound with the molecular formula Na3PO3S(H2O)x. All are white solids. The anhydrous material (x = 0) decomposes without melting at 120-125 °C.




Chemical formula:H2Na3O4PS

Molar mass:198.015 g/mol

Appearance: White solid

Density :1.58 g/cm3 (dodecahydrate), 2.40 g/cm3 for anhydrous

Melting point :53-58 °C

Solubility in water:soluble

 


Application

 

Sodium thiophosphate hydrate is used in thiosulfate-assisted synthesis of a variety of diamine-CuCN complexes. In analytical chemistry, it is used as a titrant in iodometry. It finds application as an anionic surfactant in pharmaceutical preparations to assist in dispersion and an antidote to cyanide poisoning. It is utilized for the dechlorination of tap water as well as to maintain the chlorine levels in swimming pools and aquaria. It plays an important role in gold extraction. It is also used in the alkylation reaction to prepare Bunte salts viz. S-alkylthiosulfonates, which finds application in the synthesis of thioglycolic acid.