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Per- and polyfluoroalkyl substances ( PFAS [1] or PFASs [2]) are a group of synthetic organofluorine chemical compounds that have multiple fluorine atoms attached to an alkyl chain; there are 7 million such chemicals according to PubChem. [3] PFAS came into use after the invention of Teflon in 1938 to make fluoropolymer coatings and products ...
The EPA’s new standard is the first ever nationally for PFAS in drinking water. It sets limits of 4 parts per trillion for PFOA and PFOS and 10 parts per trillion for PFNA, PFHxS and “GenX ...
Water systems must provide the public with information on the levels of PFAS in drinking water starting in 2027. Water systems have five years, until 2029, to implement solutions that reduce PFAS ...
PFAS compounds and their derivatives are widely used in many products from water resistant textiles to fire-fighting foam. [4] [1] PFAS are commonly found in every American household in products as diverse as non-stick cookware, stain resistant furniture and carpets, wrinkle free and water repellant clothing, cosmetics, lubricants, paint, pizza ...
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 ...
Groundwater is the source for Gosport's Water Utility, and tests confirm the water currently meets the federal Safe Drinking Water Act requirements, Sneed said, despite the iron and manganese content.
In acidic form it is a highly reactive strong acid. In its conjugate base form as a salt it is stable and commonly ion paired with ammonium. In the commercial product Surflon S-111 (CAS 72968-3-88) it is the primary compound present by weight. PFNA is used as surfactant for the production of the fluoropolymer polyvinylidene fluoride.
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 )). The properties of these polymers are similar to those of polytetrafluoroethylene (PTFE).