... -70-3 Appearance: brownish black Properties:Is a kind of copper black slightly bisexual, oxide, slightly hygroscopicity. The relative molecular mass ... . Insoluble in water, soluble in acid and ethanol, ammonium chloride solution, ammonia solution slowly dissolve.Use:System rayon, ceramics, glaze and enamel, battery ... (N)/%≤0.002Carbon compound(C)/%≤0.002 reagent grade 99% Copper oxide wire Cuo