NiCl2, or nickel(II) chloride, is an inorganic compound consisting of nickel and chlorine. It appears as a greenish or yellowish solid and is highly soluble in water. This compound is often used in various industrial applications, including electroplating, as a catalyst in chemical reactions, and in the production of nickel salts. In addition to its industrial uses, NiCl2 plays a role in laboratory settings, particularly in the synthesis of organic compounds. It can also be used in the preparation of nickel-based catalysts and in the study of coordination chemistry, where it forms complexes with various ligands.