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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 ...
In short, the rule sets limits on several common types of PFAS. The EPA says there is enough evidence to limit PFOA and PFOS at the lowest level they can be reliably detected. For some other types ...
PFAS chemicals are found in almost half of all of America's tap water. But there are some steps you can take to try to clean up what comes out of your faucet.
What does PFAS mean? PFAS stands for per-and polyfluoroalkyl substances. They’re man-made chemicals found in heat- and stain-resistant coatings in numerous products. “Forever chemicals” is a ...
March 2010 The Michigan Department of Environmental Quality (MDEQ) found PFAS contamination at the former Wurtsmith Air Force Base (WAFB) after sampling a former fire training area on the base. Finding a mean concentration of 5,099 ppt of PFOS and 1,309 ppt of PFOA in Clark's Marsh in Oscoda, Michigan nearby WAFB.
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.
PFAS then accumulates the biomass in fish, wildlife, ecosystems and humans. Two of the primary compounds of concern, PFOA and PFOS, pose a host of potential risks, particularly to children and ...
Perfluorohexanesulfonic acid ( PFHxS) ( conjugate base perfluorohexanesulfonate) is a synthetic chemical compound. It is one of many compounds collectively known as per- and polyfluoroalkyl substances (PFASs). It is an anionic fluorosurfactant and a persistent organic pollutant with bioaccumulative properties.