Used as a precursor in electroplating and electroless plating processes to deposit nickel coatings on metals and plastics, providing wear resistance, corrosion protection, and improved surface hardness. Commonly applied in automotive, aerospace, and electronics industries for coating connectors, printed circuit boards, and mechanical components. Also utilized in the synthesis of catalysts and in battery materials research, particularly for nickel-based rechargeable systems. Suitable for analytical chemistry as a standard solution in trace metal testing.