CuCl2, or copper(II) chloride, is an inorganic compound made up of copper and chlorine. It appears as a blue-green solid and is highly soluble in water. This compound is often used in various applications, including as a catalyst in chemical reactions and in the production of other copper compounds. In its hydrated form, CuCl2 can be found as CuCl2·2H2O, which is commonly known as copper(II) chloride dihydrate. This hydrated version is often used in laboratories and industries for processes such as electroplating and as a reagent in organic synthesis.