Cobalt Sulfide (CoS)-Powder

Characteristic




Cobalt sulfide is the name for chemical compounds with a formula CoxSy. Well-characterized species include minerals with the formula CoS, CoS2, Co3S4, and Co9S8. In general, the sulfides of cobalt are black, semiconducting, insoluble in water




Chemical formula：CoxSy

Molar mass：90.9982 g/mol

Appearance：black solid (alpha)

                       grayish-red crystals (beta)

Density：5.45 g/cm3

Melting point：1195 °C

Solubility in water：0.00038 g/100 mL (18 °C)

Solubility：slightly soluble in acid

Magnetic susceptibility (χ)：+225.0·10−6 cm3/mol

Crystal structure：octahedral (beta)




Application




In combination with molybdenum, the sulfides of cobalt are used as catalysts for the industrial process called hydrodesulfurization, which is implemented on a large scale in refineries. Synthetic cobalt sulfides are widely investigated as electrocatalysts.