Chromium(II) oxide is an inorganic compound composed of chromium and oxygen. It is a black powder that crystallises in the rock salt structure.Hypophosphites may reduce chromium(III) oxide to chromium(II) oxide:
H₃PO₂ + 2 Cr₂O₃ → 4 CrO + H₃PO₄
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Formula: CrO
Molar mass: 67.996 g/mol
Melting point: 572°F (300°C)
Classification: Inorganic compound