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Lambert JC, Oesterling EO, Angrish M, et al. Provisional Peer-Reviewed Toxicity Values for Perfluorobutane Sulfonic Acid (CASRN 375-73-5) and Related Compound Potassium Perfluorobutane Sulfonate (CASRN 29420-49-3). Cincinnati (OH): U.S. Environmental Protection Agency; 2021 Apr.
Provisional Peer-Reviewed Toxicity Values for Perfluorobutane Sulfonic Acid (CASRN 375-73-5) and Related Compound Potassium Perfluorobutane Sulfonate (CASRN 29420-49-3).
Show detailsTable 1Physicochemical Properties of PFBS (CASRN 375-73-5) and Related Compound K+PFBS (CASRN 29420-49-3)
| Property (unit) | Valuea | |
|---|---|---|
| PFBS (free acid)b | K+PFBS (potassium salt)c | |
| Boiling point (°C) | 152 | 447 |
| Density (g/cm3) | 1.83 (predicted) | 1.83 (predicted) |
| Vapor pressure (mm Hg) | 0.104 (predicted) | 1.12 × 10−8 |
| pH | ND | ND |
| Solubility in water (mol/L) | 0.0017 | 0.08 |
| Molecular weight (g/mol) | 300.09 | 338.18 |
| Dissociation constant | NA | Fully dissociated in water over the pH range of 4–9 |
- a
Values are experimentally determined unless otherwise indicated.
- b
- c
K+PFBS = potassium perfluorobutane sulfonate; NA = not applicable; ND = no data; PFBS = perfluorobutane sulfonic acid.
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