Used as a catalyst in petroleum refining, particularly in fluid catalytic cracking (FCC) processes to improve the efficiency of converting heavy hydrocarbons into lighter fractions like gasoline.

Employed as a Lewis acid catalyst in organic synthesis reactions, facilitating various chemical transformations.

Serves as a precursor for the production of pure lanthanum metal via electrolysis or reduction methods, used in high-performance magnets and electronics.

Utilized in the production of specialty glasses and optical materials, as well as lanthanum-containing ceramics and phosphors for lighting, displays, and scintillation detectors, enhancing refractive index and optical properties.

Applied in biochemical research as a traceable ion in studies of calcium ion channels due to its similar ionic radius and ability to block certain cellular pathways.

Used in water treatment processes to remove phosphate ions, helping to control eutrophication in wastewater systems.