Cupric carbonate, Cu2(OH)2CO3, is formed when copper(Cu) reacts with moist carbon dioxide (CO2) in air.Cupric Carbonate is used as a pigment in products, paints and varnishes.Copper carbonate is used in artist paints to obtain desired colours for which it is also known with different names such as verditer and mountain green.Copper carbonate is highly demanded in fireworks and pottery glazes as pigment and colorant.