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2. Perfluoroalkoxy alkane - Wikipedia

   en.wikipedia.org/wiki/Perfluoroalkoxy_alkane

   Perfluoroalkoxy alkanes (PFA) are fluoropolymers.They are copolymers of tetrafluoroethylene (C 2 F 4) and perfluoroethers (C 2 F 3 OR f, where R f is a perfluorinated group such as trifluoromethyl (CF 3)).

3. Per- and polyfluoroalkyl substances - Wikipedia

   en.wikipedia.org/wiki/Per-_and_polyfluoroalkyl...

   Skeletal structure of PFOS, an effective, persistent and bioaccumulative fluorosurfactant A physical sample of PFOA, appearing as a white solid as seen here in a relatively pure form. It is commonly referred to as the main harmful PFAS chemical and PFOA is responsible for many of the negative health effects commonly associated with PFAS.

4. Perfluoroalkyl carboxylic acids - Wikipedia

   en.wikipedia.org/wiki/Perfluoroalkyl_carboxylic...

   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.

5. Performic acid - Wikipedia

   en.wikipedia.org/wiki/Performic_acid

   Performic acid (PFA) is an organic compound with the formula CH 2 O 3. It is an unstable colorless liquid which can be produced by mixing formic acid with hydrogen peroxide . Owing to its oxidizing and disinfecting action, it is used in the chemical, medical and food industries.

6. Somerset DA's wife faces PFA; says she wasn't abused - AOL

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7. Fluoropolymer - Wikipedia

   en.wikipedia.org/wiki/Fluoropolymer

   PFA, MFA [11] (perfluoroalkoxy polymer) Sold by AGC under the tradename Fluon PFA. Sold by DuPont under the tradename Teflon-PFA. Sold by Solvay Specialty Polymers under the tradename Hyflon. [12] Neoflon : PPVE + TFE: 305 FEP (fluorinated ethylene-propylene) Sold by DuPont under the tradename Teflon FEP. Also known as Neoflon and Hyflon

8. Deadline approaches to license your dog in PA. Here's how

   www.aol.com/deadline-approaches-license-dog-pa...

   Pennsylvania dog license vary by neutered status; discounts available for some According to the agriculture department, an annual license is $8.70, and a lifetime license is $51.70.

9. Pennsylvania offers pardon application for select lower-level ...

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