Used as a photoinitiator in UV-curable inks, coatings, and adhesives. It efficiently generates free radicals upon exposure to ultraviolet light, enabling rapid polymerization of acrylate-based resins. Particularly valued in printing inks for its low yellowing and good solubility in polar formulations. Also applied in clear coatings where high transparency and durability are required. Its branched ester structure enhances compatibility with various monomers and reduces migration in cured films.