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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] They were branded as "Forever Chemicals" in an article in the Washington Post in 2018. [4]
A pizza box, for example, will have PFAS on the bottom. There’s actually some new data suggesting that PFAS are very prevalent in pesticides, and so, in fact, are being sprayed on to foods. Even ...
An example of PFAS is the fluorinated polymer polytetrafluoroethylene (PTFE), which has been produced and marketed by DuPont under its trademark Teflon. GenX chemicals and perfluorobutanesulfonic acid (PFBS) are organofluorine chemicals used as a replacement for PFOA and PFOS.
The military is the most common culprit named among the 168 water systems that pointed to a PFAS source and also reported contamination above limits the EPA set earlier this year, USA TODAY's ...
In 2024, a worldwide study of 45,000 groundwater samples found that 31% of samples contained levels of PFAS that were harmful to human health; these samples were taken from areas not near any obvious source of contamination. [41] Soil is also contaminated and the chemicals have been found in remote areas such as Antarctica. [42]
For example, flossing your teeth is good oral hygiene, but some flosses are coated in per- and polyfluoroalkyl substances (PFAS), commonly known as forever chemicals, which can make consumer ...
August 30, 2024 at 3:49 PM. North Carolina and two other states are asking the U.S. Environmental Protection Agency to regulate air emissions of four forever chemicals. On Thursday, the states ...
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).