Synonyms: 1,1,2,2,4,4,5,5-OCTAFLUORO-3,6-DIOXANON-8-ENE-1-SULFONYL FLUORIDE;2-[2-(ALLYLOXY)-1,1,2,2-TETRAFLUOROETHOXY]TETRAFLUOROETHANESULFONYL FLUORIDE;2-[2-(ALLYLOXY)-1,1,2,2-TETRAFLUOROETHOXY]TETRAFLUOROETHANESUFONYL FLUORIDE;2-[2-(ALLYLOXY)-1,1,2,2-TETRAFLUOROETHOXY]TETRAFLUOROETHANESUFONYL FLUORIDE, 97% MIN.