PFOS hör till gruppen perfluorerade alkylsyror , tillsammans med bl.a. [2] PFOS sprids genom luft och vatten, men det finns också risk för exponering and add nine new chemicals under international treaty, pressmeddelande 2009-05-08

structure also tends to perform less effectively in repellency tests. Other fluorinated chemicals, like fluorotelomer alcohols (FTOH), may have some of the same health and safety issues as PFOS and PFOA. FTOH is a by-product of most water repellents, even those that are PFOS-free and PFOA-free. So instead of removing

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-.

Pfos chemical structure

They have been used in non-stick cookware, water-repellent clothing, stain resistant fabrics and carpets, some cosmetics, some firefighting foams, and products that resist grease, water, and oil. Per- and polyfluoroalkyl substances (PFAS) are a large family of thousands of synthetic chemicals that are widely used throughout society and found in the environment. They all contain carbon-fluorine bonds, which are one of the strongest chemical bonds in organic chemistry. PFOA is considered a surfactant, or fluorosurfactant, due to its chemical structure, which consists of a perfluorinated, n -octyl “tail group” and a carboxylate “head group”. The head group can be described as hydrophilic while the fluorocarbon tail is both hydrophobic and lipophobic. 2020-07-01 · Figure 01: Structure of PFOS The chemical formula of PFOS is C 8 F 17 O 3 S. It is a hydrophobic and lipophobic compound similar to other fluorocarbon compounds. Further, its sulfonate group adds polarity to this molecule.

The unique physico-chemical properties of PFCs PFOS. PFOA. Figure 1. Structure of PFOS and PFOA and dirt-repellents, coating materials in the tex-.

R, R', R'' = any chemical group, n. ≥ novel PFAS substances developed to replace substances like PFOA and PFOS. PFAS have a wide range of different physical and chemical properties. They can be gases, liquids, or solid high-molecular weight polymers.

3 Dec 2018 The most studied PFAS are PFOA and PFOS. Both have a hydrophobic carbon chain structure of eight carbons that are fully saturated with

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.

TABLE 1-1 PFOA.
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PFECHS.

PFCs with 8 or greater Carbon atoms, including PFOA and PFOS, are long-chain PFCs. Se hela listan på pubs.rsc.org 2019-02-14 · PFAS is short for perfluoroalky and polyfluoroalkyl substances and includes chemicals known as PFOS, PFOA and GenX.
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https://www.researchgate.net/figure/Structures-of-PFOA-and-PFOS-https-doiorg-101371- https://www.environmentalpollutioncenters.org/chemical/. Hämtad

Eight additional product manufacturers followed suit in 2008, agreeing to completely eliminate using PFOS and PFOA by 2015. In 2006, Canada made moves to address the issues of PFOS and PFOA in the environment. 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 PFOS and PFOA are man-made chemicals belonging to the group known as Per- and poly-fluoroalkyl substances.

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around 70% linear (n-PFOS) and 30% branched (br-PFOS). Precusors and similar substances e.g. N-methyl and N-ethyl perfluorooctane sulfonamido ethanols (Me- and EtFOSEs) and sulfonamides (Me- and EtFOSAs) have ratios in the same range. On the other hand the telomerisation process keeps the structure of the starting telogen and a pure

ber 2017, in collaboration with the Swedish Chemicals Agency and the Swedish the environment and to increase knowledge of PFOS and PFAS. providing information on the chemical composition of products through av L Ahrens · 2014 · Citerat av 4 — PFDoDA, PFTeDA, FOSA, PFBS, PFHxS, PFOS) among the 25 target compounds. Molecular formula. CAS no. MW log Kow. Vp (Pa).