10-biphenyl-4-yl-2-isopropyl-9-oxo-9h-thioanthen-10-ium hexafluorphosphate

This compound is a sulfonium salt used as a cationic photoinitiator, typically supplied as the hexafluorophosphate salt. It is designed to initiate cationic polymerization upon exposure to ultraviolet light, making it significant in UV-curable coatings and inks.