Cobalt(II,III) oxide is a chemical compound. It contains some (1 atom) cobalt in the +2 oxidation state and some (2 atoms) in the +3 oxidation state. Its chemical formula is Co3O4. It contains cobalt and oxide ions.
Properties[change | change source]
Preparation[change | change source]
It is made when cobalt(II) oxide is heated to 600 °C (1,112 °F). When it is heated to 900 °C (1,650 °F), it turns back into cobalt(II) oxide.
Uses[change | change source]
It has been used in research for making hydrogen.
Safety[change | change source]
It is irritating to the skin. It can cause harm if swallowed. It dissolves in the stomach acid.