Perfluorobutanesulfonic acid
| Perfluorobutanesulfonic acid | |
|---|---|
 | |
| Perfluorobutanesulfonic acid | |
| Systematic name 1,1,2,2,3,3,4,4,4-Nonafluorobutane-1-sulfonic acid | |
| Other names FC-98 | |
| Identifiers | |
| CAS number | 375-73-5  , 59933-66-3 |
| PubChem | 67815  |
| ChemSpider | 61132 |
| EC number | 206-793-1 |
| UN number | 3094, 3265 |
| RTECS number | EK5930000 |
| Jmol-3D images | Image 1 |
| |
| |
| Properties | |
| Molecular formula | C4HF9O3S |
| Molar mass | 300.10 g/mol |
| Melting point | 76–84 °C[1] |
| Boiling point | 211 °C [2] |
| Hazards | |
| EU classification | Corrosive (C) |
| R-phrases | R34[3] |
| (verify) (what is: /?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | |
| Infobox references | |
Perfluorobutanesulfonic acid (PFBS) is a chemical compound with a four carbon fluorocarbon chain and a sulfonic acid functional group. As an anion it functions as a stable fluorosurfactant because of the strength of carbon–fluorine bonds.
PFBS has served as a replacement for the persistent, toxic, and bioaccumulative perfluorooctanesulfonic acid (PFOS) in 3M's Scotchgard stain repellents since June 2003.[4][5] PFBS has a much shorter half-life in people than PFOS (a little over one month vs. 5.4 years).[6] While PFBS is expected to be persistent in the environment, multiple studies (that are not referenced in following reference[5]) claim that PFBS is neither toxic nor bioaccumulative.[5]
3M markets surfactant with PFBS in two fluorosurfactants.[5]
See also
- PFOA
- PFNA
References
- ↑ "Nonafluorobutanesulphonic acid - 59933-66-3 Catalog of Chemical Suppliers". Retrieved 16 January 2009.
- ↑ Perfluorobutanesulfonic acid in the ChemIDplus database
- ↑ "Safety Data Sheet-Nonafluorobutanesulphonic acid". Retrieved 16 January 2009.
- ↑ Ullah, Aziz (October 2006). "The Fluorochemical Dilemma: What the PFOS/PFOA fuss is all about" (PDF). Cleaning & Restoration. Retrieved 16 January 2009.
- ↑ 5.0 5.1 5.2 Renner R (January 2006). "The long and the short of perfluorinated replacements". Environ. Sci. Technol. 40 (1): 12–3. doi:10.1021/es062612a. PMID 16433328.
- ↑ Betts KS (May 2007). "Perfluoroalkyl acids: what is the evidence telling us?". Environ. Health Perspect. 115 (5): A250–6. doi:10.1289/ehp.115-a250. PMC 1867999. PMID 17520044.