Ferrous chloride is a chemical compound with the formula FeCl2. It consists of iron in the +2 oxidation state and chloride ions. This compound typically appears as a greenish or yellowish solid and is soluble in water. It is often used in various industrial applications, including water treatment and as a reducing agent in chemical reactions. In addition to its industrial uses, ferrous chloride can also serve as a precursor for the production of other iron compounds. It is important in laboratories for experiments involving iron and can be used in the synthesis of iron(III) chloride when oxidized.