Reference the table below to cross-reference PFAS compounds. For more information about our PFAS standards, visit our Reference Standard FAQ.
| Acid Abbreviation | Acid Name | Acid CAS Number | Salt Abbreviation | Salt Name | Salt CAS Number |
|---|---|---|---|---|---|
| Perfluoroalkane sulfonic acids/sulfonates (PFSA) | |||||
| PFBS | Perfluorobutanesulfonic acid | 375-73-5 | PFBSK | Potassium Perfluorobutanesulfonate | 29420-49-3 |
| PFPeS | Perfluoropentanesulfonic acid | 2706-91-4 | PFPeSNa | Sodium Perfluoropentanesulfonate | 630402-22-1 |
| br-PFHxS | Perfluorohexanesulfonic acid | 355-46-4 | br-PFHxSK | Potassium Perfluorohexanesulfonate | 3871-99-6 |
| PFHxS | Perfluorohexanesulfonic acid | 355-46-4 | PFHxSNa | Sodium Perfluorohexanesulfonate | 82382-12-5 |
| PFHpS | Perfluoroheptanesulfonic acid | 375-92-8 | PFHpSNa | Sodium Perfluoroheptanesulfonate | 21934-50-9 |
| br-PFOS | Perfluorooctanesulfonic acid | 1763-23-1 | br-PFOSNa | Sodium Perfluorooctanesulfonate | 4021-47-0 |
| PFOS | Perfluorooctanesulfonic acid | 1763-23-1 | PFOSK | Potassium Perfluorooctanesulfonate | 2795-39-3 |
| PFDS | Perfluorodecanesulfonic acid | 335-77-3 | PFDSNa | Sodium Perfluorodecanesulfonate | 2806-15-7 |
| PFNS | Perfluorononanesulfonic acid | 68259-12-1 | PFNSNa | Sodium Perfluorononanesulfonate | 98789-57-2 |
| Fluorotelomer sulfonic acids/sulfonates (FTS) | |||||
| 4:2 FTS | 1H,1H,2H,2H-Perfluorohexane sulfonic acid | 757124-72-4 | 4:2 FTSNa | Sodium 1H,1H,2H,2H-Perfluorohexane sulfonate | 27619-93-8 |
| 6:2 FTS | 1H,1H,2H,2H-Perfluorooctane sulfonic acid | 27619-97-2 | 6:2 FTSNa | Sodium 1H,1H,2H,2H-Perfluorooctane sulfonate | 27619-94-9 |
| 8:2 FTS | 1H,1H,2H,2H-Perfluorodecane sulfonic acid | 39108-34-4 | 8:2 FTSNa | Sodium 1H,1H,2H,2H-Perfluorodecane sulfonate | 27619-96-1 |
| Polyfluoroalkyl ether carboxylic acids/Carboxylates (PolyFEA) | |||||
| DONA | 4,8-Dioxa-3H-perfluorononanoic acid | 919005-14-4 | NaDONA | Sodium 4,8-dioxa-3H-perfluorononanoate | 2250081-67-3 |
| Perfluoroalkyl ether carboxylic acids/carboxylates (PFECA) | |||||
| PFMBA | Perfluoro-4-methoxybutanoic acid | 863090-89-5 | PFMBANa | Sodium perfluoro(4-methoxybutanoate) | 863008-55-3 |
| Chloropolyfluroalkyl ether sulfonic acids/sulfonates | |||||
| 9Cl-PF3ONS | 9-Chlorohexadecafluoro-3-oxanonane-1-sulfonic acid | 756426-58-1 | 9Cl-PF3ONSK | Potassium 9-chlorohexadecafluoro-3-oxanonane-1-sulfonate | 73606-19-6 |
| 11Cl-PF3OUdS | 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid | 763051-92-9 | 11Cl-PF3OUdSNa | Sodium 11-chloroeicosafluoro-3-oxaundecane-1-sulfonate | 136176-45-9 |
| Perfluoroalkyl ether sulfonic acids/sulfonates (PFESA) | |||||
| PFEESA | Perfluoro(2-ethoxyethane)sulfonic acid | 113507-82-7 | PFEESANa | Sodium Perfluoro(2-ethoxyethane)sulfonate | 113507-87-2 |
