Used as a photoinitiator in UV-curable systems such as inks, coatings, and adhesives. It generates strong acid upon exposure to light, making it valuable in photoacid generator applications for microelectronics and lithography. Also employed in organic synthesis as an arylating agent and in the preparation of hypervalent iodine compounds. Shows utility in polymerization reactions, especially cationic polymerization of epoxides and vinyl ethers. Additionally researched for use in biomedical applications, including antimicrobial agents and radioprotective compounds.