Table 1.
PFAS names, CAS numbers, sources, and characteristics.
| Name | Abbreviation | CAS-RN | Vendor | Catalog Number | Chain Length1 | Short- vs long-chain2 | # of Ether Oxygens |
|---|---|---|---|---|---|---|---|
| Perfluorooctanoic acid | PFOA | 335-67-1 | Sigma | 171468 | 8 | Long-chain | 0 |
| Perfluorooctane sulfonic acid potassium salt | PFOS-K | 2795-39-3 | Sigma | 77282 | 9 | Long-chain | 0 |
| Perfluorononanoic acid | PFNA | 375-95-1 | Sigma | 394459 | 9 | Long-chain | 0 |
| Perfluorohexanoic acid | PFHxA | 307-24-4 | Sigma | 29226 | 6 | Short-chain | 0 |
| Perfluorohexane sulfonic acid | PFHxS | 355-46-4 | Synquest Laboratories | 6164-3-2T | 7 | Long-chain | 0 |
| Perfluorobutane sulfonic acid | PFBS | 375-73-5 | Synquest Laboratories | 6164-3-09 | 5 | Short-chain | 0 |
| Ammonium perfluoro(2-methyl-3-oxahexanoate) | GenX | 62037-80-3 | Synquest Laboratories | 2122-3-09 | 7 | Short-chain | 1 |
| 7H-Perfluoro-4-methyl-3,6-dioxaoctanesulfonic acid | Nafion byproduct 2 | 749836-20-2 | Synquest Laboratories | 6164-3-3J | 10 | Long-chain | 2 |
| Perfluoromethoxyacetic acid sodium salt | PFMOAA-Na | 21837-98-9 | Fluoryx Labs | FC23-02 | 4 | Short-chain | 1 |
1
Chain length does not include anionic oxygen atoms, as described in Kotlarz et al. 2020.
2
Based on guidelines described by Buck et al. 2011.