Cobalt(III) chloride is a chemical compound with the formula CoCl₃. It consists of cobalt in the +3 oxidation state and three chloride ions. This compound is typically found as a blue or purple solid and is soluble in water, forming a solution that can appear pink due to the presence of Co²⁺ ions. In addition to its use in laboratories, cobalt(III) chloride is employed in various applications, including as a catalyst in chemical reactions and in the production of cobalt salts. It is also used in humidity indicators, as it changes color when exposed to moisture.