Nomenclature
CAS number: 333-20-0
Thiocyanic acid potassium salt (1:1); potassium sulfocyanate; potassium rhodanide; Rhocya.
CKNS; mol wt 97.18.
C 12.36%, K 40.23%, N 14.41%, S 33.00%.
KSCN.
Properties
Colorless, deliquesc crystals. d 1.89; mp ≈173°, the fused salt turning brown, then
green, blue, and white again on cooling. One gram dissolves in 0.5
ml acetone, 12 ml alcohol, 8 ml boiling alcohol. When dissolved in
its own wt of water, the temp drops about 30°. The aq soln is neutral.
Poisonous. Keep well closed. LD50 orally in mice,
rats: 594, 854 mg/kg, Andersen, Chen, J. Am. Pharm. Assoc. 29, 152 (1940).Caution
Potential symptoms of overexposure
are skin eruptions, psychosis, and collapse.Use
Manuf artificial mustard oil; printing and dyeing
textiles; in photography as intensifier; in analytical chemistry for
analysis of the silver ion and indirect determn of chloride, bromide,
and iodide.