It is somewhat readily oxidized; nitric acid gives carbonic and oxalic acids, and chromic acid, carbonic and acetic acids.
Chromic acid oxidizes it to acetic acid and ozone oxidizes it to ethyl peroxide.
Chromium trioxide dissolves readily in water, and the solution is supposed to contain chromic acid, H 2 CrO 4; the salts of this acid are known as the chromates.
By the addition of hydrogen peroxide to a solution of chromic acid, a fine blue coloration due to a perchromic acid is produced which is readily absorbed by shaking out with ether.
The brilliant color of demantoid garnet is due to partial replacement of the silicate by chromic oxide.