Used as a photoinitiator in UV-curable systems such as coatings, inks, and adhesives. It absorbs ultraviolet light and generates free radicals that initiate polymerization, enabling fast curing under UV exposure. Also employed as an intermediate in the synthesis of advanced organic materials and pharmaceuticals due to its stable aromatic structure. Its high thermal and oxidative stability make it suitable for high-performance polymers and engineering plastics. Additionally, it serves as a model compound in photochemical studies and as a reference standard in analytical chemistry.