This document specifies the requirements, test methods, inspection rules, marking, packaging, transportation, storage and safety of perfluoro-2-(2-sulfonylfluoroethoxy)propyl vinyl ether (hereinafter referred to as PSVE). This document applies to perfluoro-2-(2-sulfuryl fluoroethoxy)propyl vinyl ether produced by the reaction of hexafluoropropylene oxide with tetrafluorosultone.