Used primarily as a photoinitiator in UV-curable systems. It generates free radicals when exposed to ultraviolet light, initiating polymerization of acrylate-based monomers and oligomers. Commonly found in formulations for inks, coatings, adhesives, and dental composites. Offers good reactivity and low yellowing, making it suitable for clear and white pigmented systems. Effective in both surface and deep-cure applications due to its absorption profile in the UV range.