Cobalt oxide: Specification: Co(%) >72.Ni(%)<0.5.Fe(%)\<0.1 .Heavy metal(base on Cu)(%)<0.1 .Fineness is 1.3um. Property:Celandine green powder, density:6.45g/cm3,melting point:1935癈,Insoluble in water, alcohol,ammonia water, soluble in acid and hydrate solution. Application:Used in preparing glass, ceramic glaze,also used as cobalt catalyzer and nutrient for livestock etc.. Packaging:25kg metal pail.