Used as a photoinitiator in UV-curable formulations such as inks, coatings, and adhesives. It efficiently generates free radicals upon exposure to ultraviolet light, enabling rapid polymerization of acrylate-based resins. Particularly effective in thick or pigmented systems where deep cure is required. Also employed in 3D printing resins due to its high reactivity and ability to initiate curing under visible light when combined with appropriate sensitizers. Offers good yellowing resistance and stability in final cured products.