Chromium(III) chloride is a chemical compound with the formula CrCl3. It consists of chromium in the +3 oxidation state and three chloride ions. This compound typically appears as a green or violet solid and is soluble in water, forming a green solution. It is commonly used in various applications, including as a catalyst in chemical reactions and in the production of pigments. In addition to its industrial uses, chromium(III) chloride plays a role in biological systems. It is involved in glucose metabolism and is sometimes used as a dietary supplement to support insulin function. However, excessive exposure can be harmful, so safety precautions are important when handling this compound.