Used primarily as a photoinitiator in UV-curable systems such as inks, coatings, and adhesives. It efficiently generates free radicals upon exposure to ultraviolet light, enabling rapid polymerization of acrylate-based resins. Commonly found in dental composites and 3D printing formulations due to its ability to initiate curing at lower energy inputs. Also employed in specialty printing applications where deep cure and low yellowing are required.