Perfluorobutanesulfonic acid
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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.
Names | |
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Preferred IUPAC name
1,1,2,2,3,3,4,4,4-Nonafluorobutane-1-sulfonic acid | |
Other names
FC-98 Nonaflate | |
Identifiers | |
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3D model (JSmol) |
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ChEBI | |
ChemSpider |
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ECHA InfoCard | 100.006.176 |
EC Number |
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PubChem CID |
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RTECS number |
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UNII | |
UN number | 3094, 3265 |
CompTox Dashboard (EPA) |
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Properties | |
C4HF9O3S | |
Molar mass | 300.10 g/mol |
Boiling point | 210–212 °C (410–414 °F; 483–485 K)[1] |
Hazards | |
GHS labelling: | |
[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).
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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]