COPPER(II) OXIDE can be used as ceramic colorant, reagent in analytical chemistry, insecticide for potato plants, catalyst, purification of hydrogen, batteries and electrodes, aromatic acids from cresols, electroplating, solvent for chromic iron ores, desulfurizing oils, rayon, metallurgical and welding fluxes, antifouling paints, phosphors.
Cuprous oxide (Cu2O) and cupric oxide orblack CuO are used in ceramics. Cupric oxideis generally preferred in glazes and cuprousoxide in glasses.Cupric oxide, when used in glazes, has awide range of color. It may be used either asthe raw oxide in a raw glaze, as the raw oxidein a fritted glaze, or as part of the frit itself.