Used as a catalyst in organic synthesis, particularly in carbon-carbon bond formation reactions such as the Baylis-Hillman reaction. It promotes various coupling reactions under mild conditions and enhances reaction rates and selectivity. Also employed in the synthesis of fine chemicals and pharmaceuticals due to its Lewis acid properties. In materials science, it serves as a precursor for the preparation of cerium-based oxides and thin films used in coatings with anti-reflective, UV-absorbing, or catalytic properties. Additionally, it finds use in the treatment of skin disorders and wound healing in biomedical applications, leveraging cerium’s ability to scavenge reactive oxygen species.