Used in the production of specialty glasses and optical materials due to its ability to improve refractive index and clarity. Employed in catalysts for petroleum refining and chemical synthesis, where it enhances reaction efficiency and selectivity. Applied in the manufacturing of phosphors for lighting and display technologies, contributing to bright and stable luminescence. Also utilized in research and development of lanthanum-based materials for electronic and ceramic applications. Its hydrate form supports solubility and handling in aqueous processing environments.