N-Hydroxynaphthalimide triflate99+% serves as a versatile compound with applications primarily in polymer science, contact printing, and the development of self-assembled monolayers. It is known for its function as both a cationic photoinitiator and a nonionic photoacid generator, enabling precise control in various photochemical processes. Its role extends to facilitating the formation of patterned nanoparticles, which hold significant potential for semiconductor device manufacturing, as well as aiding in photo-responsive pore reopening in zeolites for regulated gas permeation. Additionally, this compound is an essential component in creating UV-irradiated trimethylsilyl ultrathin cellulose-based films.