... 0 Appearance: brownish short filamentous solid or amorphous powder cupric oxideProperties:Is a kind of copper black ... , oxide, slightly hygroscopicity. The relative molecular mass for 79.545, density of 6.3-6.9 ... glaze and enamel, battery, oil desulfurizer, pesticides, also for hydrogen production, catalyst, with green glass etc.Details: Test ... products please contact me. Cupric oxide 99% copper powder