CoCl₃, or cobalt(III) chloride, is a chemical compound composed of cobalt and chlorine. It typically appears as a reddish-brown solid and is known for its hygroscopic nature, meaning it can absorb moisture from the air. Cobalt in this compound has a +3 oxidation state, which is important for its chemical behavior and reactivity. This compound is often used in various applications, including as a catalyst in chemical reactions and in the production of cobalt-based pigments. Additionally, CoCl₃ can be utilized in the synthesis of other cobalt compounds and in research settings to study the properties of cobalt.