Used as a photoinitiator in UV-curable formulations 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 clear coatings where low yellowing and high reactivity are required. Also utilized in dental composites and other light-cured materials due to its efficient radical generation and stability in storage.