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Nickel(III) oxide is the inorganic compound with the formula Ni2O3. It is not a well characterised, sometimes referred to as black nickel oxide.
N 1515 (OTTO) Nickel oxide, black Cas 1314-06-3 - used as the electrolyte, for the production of ceramic materials, as a catalyst, as a colorant in enamel production and for the production of plates for alkaline storage batteries used.