Used primarily as a photoinitiator in UV-curable systems, this compound plays a key role in inks, coatings, and adhesives that harden upon UV light exposure. It is especially effective in free radical polymerization reactions, where it helps initiate the cross-linking of monomers and oligomers. Commonly found in printing inks and clear coatings, it enables fast curing, low energy consumption, and high efficiency in industrial processes. It also finds use in some cosmetic formulations as a UV absorber to enhance product stability.