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C 3 F 7 SO 3 H 250.09 423-41-6 Perfluorobutanesulfonic acid: PFBS C 4 F 9 SO 3 H 300.10 375-73-5 Perfluoropentanesulfonic acid: PFPS C 5 F 11 SO 3 H 350.11 2706-91-4 Perfluorohexanesulfonic acid: PFHxS C 6 F 13 SO 3 H 400.12 355-46-4 Perfluoroheptanesulfonic acid: PFHpS C 7 F 15 SO 3 H 450.12 375-92-8 Perfluorooctanesulfonic acid: PFOS C 8 F 17 ...
The United States Environmental Protection Agency defines PFAS in the Drinking Water Contaminant Candidate List 5 as substances that contain "at least one of the following three structures: R−CF 2 −CF(R')R", where both the −CF 2 − and −CF− moieties are saturated carbons, and none of the R groups can be hydrogen; R−CF 2 −O−CF 2 ...
Trifluoroacetic acid is a widely employed acid, used for example in the synthesis of peptides.Its esters are useful in analytical chemistry. Longer-chain perfluoroalkyl carboxylic acids, e.g. with five to nine carbons, are useful fluorosurfactants and emulsifiers used in the production of polytetrafluoroethylene (Teflon) and related fluoropolymers.
Such software typically contains design, layout tools, and text editing tools for designing one's business cards. Most business card software integrates with other software (like mail clients or address books) to eliminate the need of entering contact data manually. Cards are usually printed on business card stock or saved in an electronic form ...
One of the most common and commercially available PEM materials is the fluoropolymer (PFSA) [2] Nafion, a DuPont product. [3] While Nafion is an ionomer with a perfluorinated backbone like Teflon, [4] there are many other structural motifs used to make ionomers for proton-exchange membranes. Many use polyaromatic polymers, while others use ...
Freepik is a technology company specializing in AI tools for creating and editing audiovisual content. [1] The company provides AI-powered design tools, AI-generated images, and a growing collection of stock photos, illustrations, and vector graphics, operating under a freemium business model. [2]