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(II) chromate
 * Chromium trioxide (chromium(VI) oxide), CrO3
 * Chromium(VI) oxide peroxide, CrO5
 * Mixed valence species, such as Cr8O21