Cobaltous Thiocyanate

Title: Cobaltous Thiocyanate
CAS Registry Number: 3017-60-5
Additional Names: Cobaltous rhodanide; cobaltous sulfocyanate
Molecular Formula: C2CoN2S2
Molecular Weight: 175.10
Percent Composition: C 13.72%, Co 33.66%, N 16.00%, S 36.62%
Line Formula: Co(SCN)2
Literature References: Prepn: Gmelins, Cobalt (8th ed.) 58 (part A), 380 (1932) and supplement, 720-722 (1961); Schlessinger, Inorganic Laboratory Preparations (Chemical Publishing, New York, 1962) p 44.
Properties: Yellow-brown powder. Soluble in water to give a rose-colored soln; sol in ethanol, methanol, ether, acetone, CHCl3 to give blue solns.
Derivative Type: Trihydrate
Properties: Violet to violet-brown rhombic crystals; red in transmitted light. Sol in water to give blue soln which becomes pink on dilution; sol in ethanol, ether, acetone to give blue solns.
Use: As humidity indicator.
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