Used in electroplating to deposit a protective or decorative layer of nickel on metals, enhancing corrosion resistance and surface hardness. Commonly employed in the production of batteries, especially nickel-cadmium and nickel-metal hydride types, due to its role in electrode materials. Serves as a catalyst precursor in chemical synthesis and in the manufacturing of other nickel salts. Also utilized in metal finishing, pigment formulation for ceramics and glasses, and as a mordant in textile dyeing to improve color fastness. In laboratories, it acts as a source of nickel ions in analytical chemistry and educational demonstrations.