Used as a precursor in the synthesis of lanthanum-based catalysts and ceramic materials. Employed in the preparation of lanthanum oxide films for optical coatings and electronic applications. Serves as a dopant in solid oxide fuel cells to enhance ionic conductivity. Applied in laboratories for lanthanum ion delivery in biochemical assays and as a staining agent in electron microscopy for improving contrast in biological samples. Also utilized in the production of specialty glasses and phosphors due to its ability to modify refractive index and luminescent properties.