Used primarily as a photoinitiator in UV-curable systems such as inks, coatings, and adhesives. It absorbs ultraviolet light to generate free radicals, initiating rapid polymerization of monomers and oligomers. Offers good solubility in polar solvents and compatibility with acrylate-based formulations. Also employed in specialty printing applications where low yellowing and high reactivity are required. Shows effectiveness in thin-film applications due to efficient surface curing.