Chromium oxide

Chromium oxide may refer to:

• Chromium(II) oxide, CrO
• Chromium(III) oxide, Cr₂O₃
• Chromium dioxide (chromium(IV) oxide), CrO₂, which includes the hypothetical compound chromium(III) chromate
• Chromium trioxide (chromium(VI) oxide), CrO₃
• Chromium(VI) oxide peroxide, CrO₅
• Mixed valence species, such as Cr₈O₂₁