Used as a photoinitiator in free radical polymerization, particularly in UV-curable systems such as coatings, inks, and adhesives. It efficiently generates radicals upon exposure to ultraviolet or visible light, enabling rapid curing under mild conditions. Exhibits good thermal stability and low yellowing, making it suitable for clear and white formulations. Also applied in 3D printing resins where precise initiation and minimal odor are advantageous. Soluble in common organic solvents and compatible with acrylate-based monomers and oligomers.