. . . "PFHxS (Perfluoro Hexane Sulfonate) — Codice CAS: 355-46-4"@it . "CAS:355-46-4" . "PFHxS (Perfluoro Hexane Sulfonate)"@it . "Perfluorohexane-1-sulphonic acid — CAS Identifier: 355-46-4"@en . "Perfluorohexane-1-sulphonic acid"@en . . .