Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
3980852
Reference Type
Book/Book Chapter
Title
Fluorine-containing polymers, perfluoroalkanesulfonic acids
Author(s)
Savu, P
Year
2000
Publisher
John Wiley & Sons
Location
New York, NY
Book Title
Kirk-Othmer encyclopedia of chemical technology
Language
English
DOI
10.1002/0471238961.1605180619012221.a01
Abstract
Perfluoroalkanesulfonic acids and their derivatives are of commercial significance because of their unusual acid strength, chemical stability, and the surface activity of the higher members of the series (eight carbons and larger). The best method of preparation is via the perfluorinated sulfonyl fluorides derived from electrochemical fluorination, although other methods including direct fluorination with fluorine gas are known. The first member of the series, trifluoromethanesulfonic acid, is one of the strongest acids known. Alkyl esters of trifluoromethanesulfonic acid are among the best leaving groups known and are commonly used in that capacity in displacement reactions. Lithium trifluoromethanesulfonate solutions are very conductive and can find application as electrolytes in primary lithium batteries and as antistats for films.
Derivatives of the longer-chain perfluoroalkanesulfonic acids have a number of unique surface-active properties and have formed a basis for a number of commercial products. The longer-chain acids and their salts, particularly C8F17SO3H and higher, are surface-active agents in aqueous media. They reduce the surface tension of water to levels not possible with hydrocarbon surfactants. Preparation of difunctional perfluoroalkanesulfonates and their derivatives is discussed, including fluorosulfonylacetyl fluoride. Fluorosulfonyldifluoracetyl fluoride is an important industrial intermediate used in the production of Du Pont's Nafion ion-exchange membranes and in many other applications.
Tags
PFAS
•
^Per- and Polyfluoroalkyl Substances (PFAS)
PFOA (335-67-1) and PFOS (1763-23-1)
Literature Search – Adverse outcome pathway (2015-present)
Additional Strategies
PFBS (375-73-5)
Literature Search
Additional Strategies
PFDS (335-77-3)
Literature Search
Additional Strategies
PFNS (68259-12-1)
Literature Search
Additional Strategies
PFHpS (375-92-8)
Literature Search
Additional Strategies
PFHxS (355-46-4)
Literature search
Additional Strategies
PFPeS (2706-91-4)
Literature Search
Additional Strategies
•
PFBS
Additional Strategies
Chemical/physical properties
Search
Other Sources
Excluded
•
PFDS
Literature Search
Additional Strategies
•
PFHpS
Literature Search
Additional Strategies
Screening Results
Chemical/physical properties
•
PFHxS
Background References
•
PFNS
Literature Search
Additional Strategies
Screening Results
Chemical/physical properties
•
PFOA (335-67-1) and PFOS (1763-23-1)
Literature Search – Adverse outcome pathway (2015-present)
Additional Strategies
Screening Results
Chemical/physical properties
•
PFPeS
Literature Search
Additional Strategies
Screening Results
Chemical/physical properties
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity