Used as a highly efficient photoinitiator in UV-curable systems, particularly in free radical and cationic polymerization processes. It exhibits strong absorption in the long-wavelength UV to visible light range, enabling deep curing and compatibility with LED light sources. Commonly applied in coatings, inks, adhesives, and 3D printing resins where rapid curing, low energy consumption, and minimal oxygen inhibition are critical. Its high thermal stability and low migration improve the durability and safety of cured materials.