thumb|upright|Sodium chromate (Na2CrO4) Chromium(VI) compounds in solution can be detected by adding an acidic hydrogen peroxide solution. The unstable dark blue chromium(VI) peroxide (CrO5) is formed, which can be stabilized as an ether adduct .
thumb|upright|Sodium chromate (Na2CrO4) Chromium(VI) compounds in solution can be detected by adding an acidic hydrogen per.oxide solution. The unstable dark blue chromium(VI) peroxide (CrO5) is formed, which can be stabilized as an ether adduct 