Ammonium niobate(V) oxalate hydrate is primarily used in the preparation of niobium oxide (Nb2O5) through thermal decomposition. This oxide is essential in the production of specialized ceramics and optical glasses due to its high refractive index and thermal stability. It also serves as a precursor in the synthesis of niobium-based catalysts, which are employed in various chemical reactions, including hydrocarbon oxidation and ammonia synthesis. Additionally, it finds application in the manufacturing of capacitors and other electronic components, where niobium compounds are valued for their dielectric properties. In research, it is utilized for developing advanced materials with unique electrical and optical characteristics.