Used primarily as a photoinitiator in UV-curable formulations, this compound plays a key role in inks, coatings, and adhesives. It absorbs ultraviolet light to generate free radicals, initiating rapid polymerization of monomers and oligomers. Commonly found in printing inks and protective coatings, it enables fast curing under UV light, resulting in hard, durable finishes. Its efficiency and low yellowing make it suitable for clear coatings and sensitive applications where appearance matters. Also used in some dental composites and 3D printing resins due to its reactivity and stability under controlled curing conditions.