A stable black powdered oxide. In small amounts it produces strong
blues. An active flux and can tend to violet to green depending upon
other oxides present.
Melting Point: 900oC
Molecular weight: 240.7
Glaze Material Group: Colorant
Alternative Name: Cobaltous Oxide
Safety: Toxic material or hazardous as airborne dust, and/or as powder and/or in liquid suspension