Used primarily as a photo initiator in UV-curable inks, coatings, and adhesives. It absorbs light in the near-UV range and generates free radicals that initiate polymerization of acrylates and other monomers. Commonly found in printing inks, dental composites, and electronic encapsulants where rapid curing under visible or UV light is required. Also employed in holographic recording materials due to its strong photoresponse and stability during repeated exposure cycles.