Used as a photoinitiator in cationic polymerization processes, particularly in UV-curable coatings and inks. It efficiently generates strong Lewis acids upon exposure to light, enabling rapid curing of epoxy and vinyl ether-based resins. Commonly applied in printing technologies, electronics encapsulation, and adhesive formulations where low migration and high thermal stability are required. Also utilized in 3D printing resins due to its excellent shelf life and reactivity under mild UV exposure.