Perfluorobutanesulfonic acid

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.

Perfluorobutanesulfonic acid
Preferred IUPAC name
Perfluorobutanesulfonic acid
Systematic IUPAC name
1,1,2,2,3,3,4,4,4-Nonafluorobutane-1-sulfonic acid
Other names

Nonafluorobutanesulphonic acid
Perfluorobutane sulfonate

3D model (JSmol)
ECHA InfoCard 100.006.176
EC Number
  • 206-793-1
RTECS number
  • EK5930000
UN number 3094, 3265
Molar mass 300.10 g/mol
Melting point 76 to 84 °C (169 to 183 °F; 349 to 357 K) [1]
Boiling point 211 °C (412 °F; 484 K)[2]
GHS pictograms [3]
GHS Signal word Danger
H302, H314
P280, P305+351+338, P310[3]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Since June 2003, 3M has used PFBS as a replacement for the persistent, toxic, and bioaccumulative perfluorooctanesulfonic acid (PFOS) in its Scotchgard stain repellents.[4]3M markets surfactant with PFBS in two fluorosurfactants.[5]

PFBS has a half-life of a little over one month in people, much shorter than PFOS with 5.4 years.[6] PFBS is persistent in the environment. Studies have not yet been specifically conducted to determine safety in humans.

See also


  1. "Nonafluorobutanesulphonic acid – 59933-66-3 Catalog of Chemical Suppliers". Retrieved 16 January 2009.
  2. Perfluorobutanesulfonic acid in the ChemIDplus database
  3. Sigma-Aldrich Co., Nonafluorobutane-1-sulfonic acid. Retrieved on 15 January 2018.
  4. Ullah, Aziz (October 2006). "The Fluorochemical Dilemma: What the PFOS/PFOA fuss is all about" (PDF). Cleaning & Restoration. Retrieved 16 January 2009.
  5. 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.
  6. 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.
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