Calcium Cyanide
Title: Calcium Cyanide
CAS Registry Number: 592-01-8
Trademarks: Cyanogas
Molecular Formula: C2CaN2
Molecular Weight: 92.11
Percent Composition: C 26.08%, Ca 43.51%, N 30.41%
Line Formula: Ca(CN)2
Literature References: Prepn: Gmelins, Calcium (8th ed.) 28B, 173-178, 958-960 (1958). Commercial prepns contain 40-50% Ca(CN)2. Toxicity study: H. F. Smyth et al., Am. Ind. Hyg. Assoc. J. 30, 470 (1969). Review of toxicology and human exposure: Toxicological Profile for Cyanide (PB98-101207, 1997) 291 pp.
Properties: Rhombohedric crystals or powder; dec in moist air liberating hydrogen cyanide. Very poisonous! Sol in water with gradual liberation of HCN; even very weak acid (CO2) liberates HCN; sol in alc. Keep dry. LD50 orally in rats: 39 mg/kg (Smyth).
Toxicity data: LD50 orally in rats: 39 mg/kg (Smyth)
Use: Fumigant; rodenticide; in stainless-steel manuf; in leaching ores of precious metals; stabilizer for cement.

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