Cobalt Sulfide (CoS)-Powder

Characteristic

Cobalt sulfide is the name for chemical compounds with a formula Co_xS_y. 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：Co_xS_y

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.