Oxide of chrome VI
Chromium oxide (VI) (chromium trioxide, chromium trioxide, chromic anhydride), CrO3 - a compound of chromium with oxygen, dark red crystals, readily soluble in water. Chromic and dichromic acid anhydride.
Used to obtain chromium by electrolysis, electrolytic chromium plating; chromating galvanized parts, as a strong oxidizing agent, occasionally in pyro compositions.
It is also used as an oxidizing agent in organic chemistry (in the production of isatin, indigo, etc.).
In a mixture with diatomaceous earth it is used to purify acetylene called epurite.
Chromic anhydride solutions (or, more often,