Molecular weight: 151.99.
Mohs hardness of 8.5 to 9
Refractive index of 2.5 (good cover ratio)
Specific heat capacity (20 ° C) / 0.17J / (g K)
Melting point: 22654 ° C
Boiling point: 3000 ° C, is a high-quality refractory.
Chrome oxide is a green crystal powder, metal luster, magnetic, good covering strength, high-temperature-resisting and sunlight fastness. Not soluble in water, barely soluble in acids, comparatively stable in air, unaffected by acids and alkalis of common density, sulfur dioxide, sulfur hydrogen etc. Chrome oxide green enjoys excellent quality and firmness of coloring.
Insoluble in water, acid and organic solvents, slightly soluble in concentrated sodium hydroxide solution, sodium bromide dissolved in hot, hot or boiling concentrated perchloric acid solution of parathion mixed acid.