Nickel chloride is a chemical compound with the formula NiCl2. It appears as a green or yellowish crystalline solid and is soluble in water. This compound is often used in various industrial applications, including electroplating, dyeing, and as a catalyst in chemical reactions. In addition to its industrial uses, nickel chloride is also important in laboratories for preparing other nickel compounds. It can be produced by reacting nickel oxide with hydrochloric acid. However, it is essential to handle nickel chloride with care, as it can be toxic and harmful to the environment.