Perfluorobutanesulfonic acid

Perfluorobutanesulfonic acid
Names
Preferred IUPAC name
1,1,2,2,3,3,4,4,4-Nonafluorobutane-1-sulfonic acid
Other names
FC-98

Nonaflate
Nonafluorobutanesulphonic acid
Perfluorobutane sulfonate

PFBS
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.006.176 Edit this at Wikidata
EC Number
  • 206-793-1
RTECS number
  • EK5930000
UNII
UN number 3094, 3265
  • InChI=1S/C4HF9O3S/c5-1(6,3(9,10)11)2(7,8)4(12,13)17(14,15)16/h(H,14,15,16) checkY
    Key: JGTNAGYHADQMCM-UHFFFAOYSA-N checkY
  • InChI=1S/C4HF9O3S/c5-1(6,3(9,10)11)2(7,8)4(12,13)17(14,15)16/h(H,14,15,16)
    Key: JGTNAGYHADQMCM-UHFFFAOYSA-N
  • OS(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F
Properties
C4HF9O3S
Molar mass 300.10 g/mol
Boiling point 210–212 °C (410–414 °F; 483–485 K)[1]
Hazards
GHS labelling:
GHS05: CorrosiveGHS07: Exclamation mark[2]
Danger
H302, H314
P280, P305+P351+P338, P310[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Perfluorobutanesulfonic acid (PFBS) is a PFAS chemical compound having a four-carbon fluorocarbon chain and a sulfonic acid functional group. It is stable and unreactive because of the strength of carbon–fluorine bonds. It can occur in the form of a colorless liquid or a corrosive solid.[1] Its conjugate base is perfluorobutanesulfonate (also called nonaflate) which functions as the hydrophobe in fluorosurfactants.

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

  1. ^ a b "Perfluorobutanesulfonic acid". PubChem. NIH. Retrieved 10 August 2021.
  2. ^ a b Sigma-Aldrich Co., Nonafluorobutane-1-sulfonic acid. Retrieved on 15 January 2018.
  3. ^ Ullah, Aziz (October 2006). "The Fluorochemical Dilemma: What the PFOS/PFOA fuss is all about" (PDF). Cleaning & Restoration. Retrieved 16 January 2009.
  4. ^ 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.