Product Description: Nickel(III) oxide (Ni2O3) has been referred to in the literature, but is not a well characterised compound.The substance black nickel oxide is sometimes described as being Ni2O3; however, the composition quoted by suppliers has a nickel content of around 77% by weight, whereas Ni2O3 would have 70.98% Ni by weight, and may be non-stoichiometric NiO. Product Specification: Melting Point: 600 Degree C Density: 4.84 g/cm3 Formula: Ni2O3 Molar Mass: 165.39 g/mol