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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]
What the EWG found is that filters’ effectiveness at reducing PFAS in tap water varied. Here’s how some of the most popular filters stacked up in EWG’s tests. Travel Berkey: 100% removal of ...
Dr. Carmen Marsit: PFAS are a class of about 15,000 human-made chemicals that contain fluorine groups, which give them special properties. They are in nonstick surfaces; they’re used in ...
Perfluorooctanoic acid (PFOA; conjugate base perfluorooctanoate; also known colloquially as C8, for its 8-carbon chain structure) is a perfluorinated carboxylic acid produced and used worldwide as an industrial surfactant in chemical processes and as a material feedstock. PFOA is considered a surfactant, or fluorosurfactant, due to its chemical ...
This timeline of events related to per- and polyfluoroalkyl substances (PFASs) includes events related to the discovery, development, manufacture, marketing, uses, concerns, litigation, regulation, and legislation, involving the human-made PFASs. The timeline focuses on some perfluorinated compounds, particularly perfluorooctanoic acid (PFOA ...
Man-made PFAS are known as forever chemicals because of their durability. The chemicals also tend to move easily through water, meaning that once emitted from a stack they can easily find their ...
Scotchgard. Scotchgard is a 3M brand of products, a stain repellent and durable water repellent applied to fabric, furniture, and carpets to protect them from stains. Scotchgard products typically rely on organofluorine chemicals as the main active ingredient along with petroleum distillate solvents. [1]
We know the source of PFAS pollution: companies such as 3M and DuPont, which invented PFAS, used them in firefighting foam and nonstick or stain-resistant coatings, and made billions of dollars ...