Used in electroplating to deposit nickel metal onto surfaces for improved corrosion resistance, wear protection, and aesthetic finish, particularly in automotive, electronics, and appliance industries.

Commonly employed in the production of rechargeable nickel-based batteries, such as nickel-cadmium and nickel-metal hydride batteries.

Serves as a catalyst precursor in industrial chemical reactions, a mordant in textile dyeing to fix dyes onto fabrics, and in ceramics for green or gray coloring in glazes.

Also utilized in metal surface treatment processes, as a nutrient source of nickel in industrial fermentation, agricultural fertilizers, and occasionally in laboratory research for transition metal studies or heavy metal removal from wastewater (with caution due to environmental and health toxicity).