Used as a photoinitiator in UV-curable systems, particularly in inks, coatings, and adhesives. It absorbs ultraviolet light and generates free radicals that initiate polymerization of monomers and oligomers, enabling rapid curing under UV exposure. Its formulation is valued in printing inks for high-speed processing and in clear coatings where low yellowing is desired. Also found in specialty applications requiring efficient curing through thin films or pigmented systems due to its favorable absorption profile and reactivity.