Used primarily as a photoinitiator in UV-curable systems such as inks, coatings, and adhesives. It absorbs ultraviolet light to generate free radicals that initiate polymerization, enabling rapid curing under UV exposure. Commonly found in printing inks and protective coatings where fast drying and strong film formation are required. Also utilized in some dental materials and 3D printing resins due to its efficient reactivity under UV light. Shows good solubility in organic solvents and compatibility with acrylate-based monomers.