Kobolttioksidi

Kobolttioksidi is a chemical compound with the formula CoO. It is a dark gray to black solid and is one of the main oxides of cobalt. Cobalt(II) oxide is insoluble in water but soluble in acids. It can be prepared by heating cobalt(II) carbonate or cobalt(II) hydroxide in the absence of air.

Cobalt(II) oxide is primarily used as a pigment. It imparts a deep blue color to glass and ceramics. This blue color, known as cobalt blue, is highly prized for its intensity and durability. It is also used in the production of smalt, a glass-based pigment. In addition, cobalt(II) oxide serves as a precursor for the synthesis of other cobalt compounds. It is also employed in the manufacture of magnetic materials and in certain catalytic applications.

The oxidation state of cobalt in cobalt(II) oxide is +2. It is a stable compound under normal conditions. However, upon heating in an oxidizing atmosphere, it can be converted to cobalt(III) oxide, Co2O3, or cobalt(II,III) oxide, Co3O4. Environmental and health considerations associated with cobalt compounds, including cobalt(II) oxide, are important and require appropriate handling procedures.