Chromyl chloride, also known as chromium oxychloride is a chemical compound. It has the formula CrOCl. It is an red liquid. It is made by reacting hydrochloric acid with chromium(VI) oxide or potassium chromate. It is a strong oxidizing agent. When it is mixed with sulfur it oxidizes it. It is the result of a test for chloride. It is toxic because it contains chromium in its +6 oxidation state. It also contains some hydrochloric acid. It reacts with grease and some plastics.