Used as a photoinitiator in UV-curable coatings, inks, and adhesives. It absorbs ultraviolet light to generate free radicals, initiating rapid polymerization of monomers and oligomers. Commonly applied in printing inks, electronic coatings, and clear finishes where fast curing and low yellowing are required. Also found in some dental composites and 3D printing resins due to its efficient curing under UV light.