Used as a photoinitiator in UV-curable systems, particularly in inks, coatings, and adhesives. It efficiently generates free radicals upon exposure to ultraviolet light, enabling rapid polymerization of acrylate-based resins. Its high reactivity and ability to function in thick sections or pigmented formulations make it suitable for industrial curing applications where deep and complete cure is required. Also valued for low yellowing in clear coatings and good storage stability in formulated products.