Nickel(II) oxalate hydrate is primarily used in the synthesis of nickel-based catalysts, which are essential in various industrial chemical reactions, including hydrogenation and reforming processes. It serves as a precursor for producing nickel nanoparticles and other nickel compounds, which are utilized in battery technologies, particularly in the development of nickel-metal hydride batteries. Additionally, it finds application in the preparation of specialty ceramics and glasses, where nickel incorporation can modify electrical and optical properties. In research, it is employed as a reagent for studying coordination chemistry and as a starting material for the deposition of nickel films through chemical vapor deposition techniques.