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 cross-linking of monomers and oligomers. Due to its good absorption in the UVA range and efficient radical generation, it is favored in formulations requiring rapid curing and low residual odor. Common applications include printing inks, electronic coatings, and thin-film coatings where deep cure and clarity are important.