Chromic acid is a chemical that comes in several forms. It is made by reacting chromates or dichromates with acids or by reacting chromium(VI) oxide with sulfuric acid. As its name shows, it is an acid. It is a strong oxidizing agent. When it is reduced, it turns green. It is used to oxidize many chemicals, such as alcohol. It is very toxic because it contains the chromate ion. It is either a reddish solution or red flakes. It is used to make chromyl chloride.