Nomenclature
CAS number: 1762-95-4
Thiocyanic acid ammonium salt (1:1); ammonium rhodanide; ammonium sulfocyanate; ammonium sulfocyanide.
CH
4N
2S; mol wt 76.12.
C 15.78%, H 5.30%, N 36.80%, S 42.12%.
NH
4SCN.
Description and references
Commercial grade is 98-99% pure. Prepn: Gmelins, Ammonium (8th ed.) 23, pp 372-383 (1936). 13C and 15N NMR study:
R. M. Dickson et al., Can. J.
Chem. 65, 941 (1987). Reagent in determn of
carboxyl termini of peptides: G. Stark, Biochemistry 7, 1796 (1968); L. D. Cromwell,
G. R. Stark, ibid. 8, 4735 (1969). Review of
toxicology and human exposure: Toxicological
Profile for Cyanide (PB98-101207, 1997) 291 pp. Synthetic
applications in thiocyanation reactions: N. N. Karade et al., Synth. Commun. 35, 1197 (2005); G. Wu et al., Tetrahedron Lett. 46, 5831 (2005); P. Srihari et al., Synthesis 2006, 2772. Laboratory information profile: J. A. Young, J. Chem. Educ. 82, 1619 (2005).
Properties
Deliquesc crystals. mp ≈149°. Dec at 170°. Freely sol in water,
ethanol; sol in methanol, acetone. Practially insol in CHCl3, ethyl acetate. Reacts violently with oxidizing
agents, esp potassium chlorate. Protect from light.Caution
Potential symptoms of overexposure
by ingestion are hallucinations and distorted perceptions, nausea
or vomiting, and other gastrointestinal effects.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 Fe, Ag,
Hg.