The black cupric oxide (CuO) is a kind of copper oxide, slightly bisexual, slightly hygroscopic. Relative molecular mass is 79.545, the density is 6.3 ~ 6.9 g/cm, melting point 1326 ℃. Insoluble in water and ethanol, soluble in acid, ammonium chloride and potassium cyanide solution, slowly dissolve in ammonia solution.
Relative quality: 79.55 Solubility: insoluble in water and alcohol, soluble in diluted acid, ammonium chloride, ammonium carbonate and potassium cyanide, slowly dissolve in ammonia generated complexes; Description: black to dark brown amorphous or crystalline powder. Goods are granular, linear, etc. Slightly hygroscopic. Soluble in dilute acid, alkaline cyanide or ammonium carbonate solution, slowly dissolve in ammonia water, almost insoluble in water and ethanol. Relative density (d144) 6.315. Melting point is 1026 ℃. Stimulating.