Used as a photoinitiator in UV-curable formulations such as inks, coatings, and adhesives. It absorbs ultraviolet light to generate free radicals, initiating rapid polymerization of acrylate-based resins. Commonly found in printing inks and clear coatings where low yellowing and good surface cure are required. Also utilized in some dental composites and 3D printing resins due to its efficient curing performance under UV exposure.