Table 1.
A) Reference perfluoro-ether carboxylic acids included in the PFECA standard mixture and B) emerging perfluorinated ether species lacking analytical standards.
| A) Perfluorinated Ether Standards | |||
|---|---|---|---|
| Compound Name | CAS | Formula | Structure |
| Perfluoro(4-oxapentanoic acid) (“Surrogate 1”) | 863090–89-5 | C5HF9O3 |
|
| Perfluoro(3,6-dioxaheptanoic acid) (“Surrogate 2”) | 151772–58-6 | C5HF9O4 |
|
| Perfluoro(3-oxabutanoic acid) (“Surrogate 3”) | 377–73-1 | C4HF7O3 |
|
| Perfluro(5-oxa-6-dimethylhexanoic) acid (“Surrogate 4”) | 801212–59-9 | C7HF13O3 |
|
| Perfluoro(2-methyl-3-oxahexanoic) acid (“HFPO-DA”) | 13252–13-6 | C6HF11O3 |
|
|
| |||
| B) Emerging Compounds | |||
|
| |||
| Compound Name | CAS | Formula | Structure |
| Perfluoro-methoxyacetic acid (PFMOAA) | 674–13-5 | C3HF5O3 |
|
| Perfluoro-3,5-dioxahexanoic acid (PFO2HxA) | 39492–88-1 | C4HF7O4 |
|
| Perfluoro-3,5,7-trioxaoctanoic acid (PFO3OA) | 39492–89-2 | C5HF9O5 |
|