PFCAs
Perfluoroalkyl carboxylic acids
PFOA
Name: Perfluorooctanoic acid
| CAS | Formula | Solubility in water (mg/L) | pKa |
|---|---|---|---|
| 335-67-1 | C7F15COOH | 2290 (24°C) | -0.5-4.2 |
Keywords: Hydrophobic Interactions, Long Chain, adsorbents with amine groups, the most representative PFAS.
PFHxA
Name: Perfluorohexanoic acid
| CAS | Formula | Solubility in water (mg/L) | pKa |
|---|---|---|---|
| 307-24-4 | C5F11COOH | 15700 (RT) | -0.16 |
Keywords: Hydrophobic Interactions, Short Chain.
PFHpA
Name: Perfluoroheptanoic acid
| CAS | Formula | Solubility in water (mg/L) | pKa |
|---|---|---|---|
| 375-85-9 | C6F13COOH | 3.65 (at 25°C) | -2.29 |
Keywords: Hydrophobic Interactions, Long Chain.
PFBA
Name: Perfluorobutanoic acid/Heptafluorobutyric acid
| CAS | Formula | Solubility in water (mg/L) | pKa |
|---|---|---|---|
| 375-22-4 | C3F7COOH | N/A | 1.07 |
Keywords: Hydrophobic Interactions, Short Chain.
PFSAs
Perfluoroalkyl sulfonic acids
PFOS
Name: Perfluorooctane sulfonic acid
| CAS | Formula | Solubility in water (mg/L) | pKa |
|---|---|---|---|
| 1763-23-1 | C8F17SO3H | 3.2x10-3 (at 25°C) | <1.0 |
Keywords: Hydrophobic Interactions, Long Chain, adsorbents with amine groups, the most representative PFAS.
PFHxS
Name: Perfluorohexane sulfonic acid
| CAS | Formula | Solubility in water (mg/L) | pKa |
|---|---|---|---|
| 355-46-4 | C6F13SO3H | 6.2 (at 25°C) | 0.14 |
Keywords: Long Chain
PFBS
Name: Perfluorobutanesulfonic acid
| CAS | Formula | Solubility in water (mg/L) | pKa |
|---|---|---|---|
| 375-73-5 | C4F9SO3H | 344 (at 25°C) | -3.31 |
Keywords: Short Chain
6:2 FTSA
Name: 1-Octanesulfonic acid, 6:2 FTSA, H4PFOS
| CAS | Formula | Solubility in water (mg/L) | pKa |
|---|---|---|---|
| 27619-97-2 | C8H5F13O3S | 58000 (at 20°C) | 1.31 |
Keywords: Long Chain, Similar to PFOS
6:2 FTSAB
Name: 1-Propanaminium, 6:2 FTSAB
| CAS | Formula | Solubility in water (mg/L) | pKa |
|---|---|---|---|
| 34455-29-3 | C15H19F13N2O4S | 50 (at 20°C) | N/A |
Keywords: Long Chain, Betaine
