Used as a precursor in the synthesis of yttrium-containing materials, especially in the production of phosphors for LED lighting and display technologies. Plays a role in catalysis for organic transformations, where it acts as a Lewis acid catalyst. Employed in research for developing luminescent compounds and in the preparation of yttrium oxide coatings. Also utilized in the fabrication of specialty glasses and ceramics with enhanced thermal and optical properties. In some cases, applied in biomedical research, particularly in the development of imaging agents and radiopharmaceuticals.