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.
|Preferred IUPAC name
|Systematic IUPAC name
3D model (JSmol)
|UN number||3094, 3265|
CompTox Dashboard (EPA)
|Molar mass||300.10 g/mol|
|Melting point||76 to 84 °C (169 to 183 °F; 349 to 357 K)|
|Boiling point||211 °C (412 °F; 484 K)|
|GHS Signal word||Danger|
|P280, P305+351+338, P310|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Since June 2003, 3M has used PFBS as a replacement for the persistent, toxic, and bioaccumulative perfluorooctanesulfonic acid (PFOS) in its Scotchgard stain repellents.3M markets surfactant with PFBS in two fluorosurfactants.
PFBS has a half-life of a little over one month in people, much shorter than PFOS with 5.4 years. PFBS is persistent in the environment. Studies have not yet been specifically conducted to determine safety in humans.
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- Perfluorobutanesulfonic acid in the ChemIDplus database
- Sigma-Aldrich Co., Nonafluorobutane-1-sulfonic acid. Retrieved on 15 January 2018.
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