Used in electroplating to deposit a protective or decorative layer of nickel on metal surfaces, enhancing corrosion resistance and wear protection. Commonly employed in the manufacturing of batteries, especially nickel-cadmium and nickel-metal hydride types, due to its role in electrode materials. Serves as a catalyst precursor in industrial chemical reactions and as a mordant in textile dyeing to help fix dyes onto fabrics. Also utilized in the production of other nickel compounds and in laboratory settings as a source of nickel ions for analytical and synthetic purposes.