Cobaltous Sulfide

Title: Cobaltous Sulfide
CAS Registry Number: 1317-42-6
Molecular Formula: CoS
Molecular Weight: 91.00
Percent Composition: Co 64.76%, S 35.24%
Literature References: Prepn: Glemser in Handbook of Preparative Inorganic Chemistry vol. 2, G. Brauer, Ed. (Academic Press, New York, 2nd ed., 1965) p 1523.
Properties: Exists in two forms. a-CoS: black, amorphous powder. Forms Co(OH)S in air. Sol in HCl. b-CoS: grey powder or reddish-silver octahedral crystals. mp >1100°; d 5.45. Practically insol in water; sol in acids.
Melting point: mp >1100°
Density: d 5.45
Use: Catalyst for hydrogenation or hydrodesulfurization.
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