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Perfluorooctanesulfonic acid | C8HF17O3S | Perfluorooctanesulfonic acid (PFOS) (conjugate base perfluorooctanesulfonate) is an anthropogenic fluorosurfactant and global pollutant. PFOS was the key ingredient in Scotchgard, a fabric protector made by 3M, and numerous stain repellents. It was added to Annex B of the Stockholm Convention on Persistent Organic Pollutants in May 2009. PFOS: Benzene: Chemical Formula: C 8 HF 15 O 2: C 8 HF 17 O 3 S: C 6 H 6: Molecular Weight(g/mol) 414.09: 500.13: 78.11: Boiling Point (o C) 192.4: 259: 80: Vapor Pressure (mm Hg at 25 o C) 0.525 ~0.002: 86: Henry’s Law Constant @ 25 o C (unitless) Not measurable: Not measurable: 0.225: Koc: 115: 371: 79: Solubility in Water (mg/L) ~9,500: 680: 1,780 PFOS ( Ammonium (NH4 + ) salt ): 1-Octanesulfonic acid, 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-. heptadecafluoro-, ammonium salt. CAS No: 29081-56-9. Synonym: 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-Heptadecafluoro-1-.

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In 2006, when 3M and DuPont, under legal and regulatory pressure, began  The most notorious PFAS chemicals – PFOA, the Teflon chemical, and PFOS, an ingredient in Chemical companies claim this structure makes them safer. 29 Nov 2011 CAS No, molecular formula and main physicochemical properties of these compounds are summarized in Table 1, log Kow and log Dow are. PFAS are commonly have an aliphatic carbon composition in which hydrogen molecules have Figure 3 shows the molecular structure of PFOS and PFOA. The double amphiphilic nature of PFAAs is due to their molecular structure.

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They can be gases, liquids, or solid high-molecular weight polymers. They are sometimes  of substances with various chemical structures and technical performance Accumulation of Long-chained PFCAs and PFOS in sludge. av K Norström · 2015 · Citerat av 2 — is not limited to PFOS in AFFF, but concerns the entire chemical group, which This moiety gives the PFAS oleophobic properties and the strength of the C-F  av A Woldegiorgis · 2006 · Citerat av 3 — Screening, PFAS, perfluorinated substances, PFBS, PFHxS, PFOS, PFDS, CAS no and chemical structure of selected PFAS substances. Perfluoroktansulfonsyra (PFOS, perfluoroktansulfonat) är ett perfluorerat PFOS hör till gruppen perfluorerade alkylsyror (PFAS), tillsammans med bl.a.

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Page 8. 8. Perfluoroalkylated substances: PFOA, PFOS and PFOSA. Chemical structures and origins of per- and polyfluoroalkyl substances that are Perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS),  The chemical structure of the potassium salt of PFOS is shown in Figure 2. Page 14. PFOS/PFOA. The EFSA Journal (2008) 653, 14-131.

PFOS och PFOS-relaterade ämnen är högfluorerade och extremt svårnedbrytbara. EnglishIt is concerned with restricting the marketing and use of perfluorooctane sulfonates (PFOS) and related substances. chemical substances substantiv related skill · related species · related story · related structures · related study  av D Malnes — More than 100 chemical substances have been analyzed in drinking water treatment plants covered that PFOS – a PFAS – exceeded the limit value at several loca- tions and Pollutants: Origin, Structure, and Properties. av KW Park — tennorganic compounds and perflourinated chemicals (including PFOS). Between Overview of Research on Abundance, Distribution and Population Structure. ”Tot-PFOS” på ca 14 ng/ml vilket är fem gånger mer än vad Jytte Guteland har av resolution mass spectrometry with pattern deconvolution, Analytical chemistry, 87, A rapid method for analysis of PFAS including structural PFOS isomers in  utöver PFOS, som hittas i miljön, vilka ämnen som bryts ned till dessa perfluoralkylsulfonater. (PFAS) och in more complex structures (e.g.
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PFECHS. (CAS# 80988-54-1). PFOS. This subchapter will contain a brief description of the chemical, physical, environmental and biological properties of PFOS derivatives. These are surfactants with  17 Oct 2017 Chemical Structure of PFOA and PFOS | The ABCs of PFCs in Water The new LHAs recommend that PFOS and PFOA concentrations,  chemical structure of PFCs is a chain of carbon atoms.

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Perfluorooctane sulfonic acid (PFOS) Cycle 10 P a g e | 2 Chemical Profile PFOS Structure: CAS Number: 1763-23-1 Formula: C8HF17O3S Molar Mass: 500.03 g/mol Synonyms: perfluorooctane sulfonate 1-perfluorooctanesulfonic acid heptadecafluoro-1-octanesulfonic acid heptadecafluorooctan-1-sulphonic acid perfluorooctylsulfonic acid Se hela listan på pfas-1.itrcweb.org Perfluorooctane sulfonate (PFOS) is a fully fluorinated anion that can be formed by degradation from a large group of related substances, close to 100 in total, referred to as PFOS-related substances. PFOS has been detected at low levels in the blood of humans and wildlife throughout the United States, providing clear evidence of widespread exposure to the chemical.

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These chemicals are now known to have seeped  Everyone is aware of DDT- a very common pesticide. Did you know DDT was sold as a wonder-chemical post World War II? It is because DDT was a very simple  24 Jun 2020 Longer chain chemicals are the most persistent. the potential health effects associated with exposures to PFOA, PFOS and limited others.

However, most production of PFOS ceased in 2002. Manufacture and While PFOA and PFOS are both C8 fluorinated organic compounds (i.e.