Used as a precursor in the synthesis of lanthanum-containing materials for optical coatings and phosphors in lighting and display technologies. Employed in the preparation of catalysts for petroleum refining and polymerization reactions, including high-specificity organic syntheses such as C-C bond formation. Applied in biochemical research as a trace element source or enzyme activity modulator, including studies on rare earth metals in biological systems. Utilized in water treatment processes to reduce phosphate levels, helping control algal growth. Also serves in the production of specialty glasses with precise refractive indices (e.g., for microscopes and telescopes) and ceramics with enhanced thermal, electrical, and magnetic properties, as well as in surface coating processes to improve high-temperature and corrosion resistance.