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Per- and polyfluoroalkyl substances (also PFAS [1],PFASs [2], and sometimes referred to as "forever chemicals" [3] [4]) 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. [5]
Download 2 [a] is a side-scrolling 1991 shoot 'em up video game published by NEC Avenue for the PC Engine CD-ROM². It is the sequel of Download and also inspired an anime OVA . Gameplay
The timeline focuses on some perfluorinated compounds, particularly perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) [1] and on the companies that manufactured and marketed them, mainly DuPont and 3M. [2] An example of PFAS is the fluorinated polymer polytetrafluoroethylene (PTFE), which has been produced and marketed by ...
6:2-fluorotelomersulfonic acid (6:2-FTS) is a chemical compound that belongs to the group of fluorotelomersulfonic acids within the broader class of per- and polyfluorinated alkyl compounds (PFAS). Due to its structural similarity to perfluorooctanesulfonic acid (PFOS), it is also called H 4 PFOS.
For games that were originally released as freeware, see List of freeware video games. For free and open-source games, and proprietary games re-released as FLOSS, see List of open-source video games. For proprietary games with released source code (and proprietary or freeware content), see List of commercial video games with available source code.
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 .
In humans, PFOSA has been detected in sub- to low-parts per billion levels; [14] for example, in 1999–2000 US serum samples, the 95th percentile (or value where only 5% of the population was higher) was 1.4 parts per billion [15] while in 2003–2004 the 95th percentile fell to 0.2 parts per billion. [16]
Since then, 3M has continued to use PFAs in a variety of products, with Scotchgard being the most well known and commercially lucrative. [4] Until the early 2000s, waste from the production of PFAs was dumped at four sites in Minnesota, the Washington County Landfill, the 3M Cottage Grove Chemolite Site, the 3M Woodbury site, and the 3M Oakdale ...