Title: Ammonium Thiocyanate

CAS Registry Number: 1762-95-4

CAS Name: Thiocyanic acid ammonium salt

Additional Names: ammonium rhodanide; ammonium sulfocyanate; ammonium sulfocyanide

Molecular Formula: CH4N2S

Molecular Weight: 76.12

Percent Composition: C 15.78%, H 5.30%, N 36.80%, S 42.12%

Line Formula: NH4SCN

Literature References: Commercial grade is 98-99% pure. Prepn: Gmelins, Ammonium (8th ed.) 23, pp 372-383 (1936). Review of toxicology and human exposure: Toxicological Profile for Cyanide (PB98-101207, 1997) 291 pp.

Properties: Deliquesc crystals. mp ~149°. Freely sol in water, ethanol; sol in methanol, acetone. Practially insol in CHCl3, ethyl acetate. Keep tightly closed.

Melting point: mp ~149°

Use: In matches; double-dyeing fabrics; photography; improving and increasing strength of silks weighted with tin salts; producing grayish-black coating on Zn; manuf transparent artificial resins, thiourea; in pesticides. Detection and determn of small quantities of Fe; determn of Ag, Hg, etc.