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Copper(II) oxide or cupric oxide is the inorganic compound with the formula CuO.
C 3687 (OTTO) Copper(II) oxide, 99.995% Cas 1317-38-0 - used when welding with copper alloys. C 3687 (OTTO) Copper(II) oxide, 99.995% Cas 1317-38-0 - used in the preparation of ceramics with capacitor properties.