Used primarily in the separation and purification of neodymium from rare earth element mixtures. Its low solubility in water allows selective precipitation, making it valuable in hydrometallurgical processes to isolate neodymium from ores or recycled materials. After precipitation, neodymium oxalate is typically calcined to produce neodymium oxide, which is further used in manufacturing strong permanent magnets for electronics, electric motors, and wind turbines. It also serves as an intermediate in producing neodymium-based catalysts and specialty glasses with enhanced optical properties.