Perfluorooctanesulfonic acid

Many superacid-catalyzed reactions were found to be carried out advantageously not only using liquid superacids but also over solid superacids, including Nafion-H or certain zeolites. We extensively studied the catalytic activity of Nafion-H and related solid acid catalysts (including supported perfluorooctanesulfonic acid and its higher ho-... 

ECF is successfully used on a commercial scale to produce certain perfluoroacyl fluorides, perfluoroalkylsulfonyl fluorides, perfluoroalkyl ethers, and perfluoroalkylamines. The perfluoroacyl fluorides and perfluoroalkylsulfonyl fluorides can be hydrolyzed to form the corresponding acid and acid derivatives. Examples include perfluorooctanoyl fluoride [335-66-0] perfluorooctanoic acid [335-67-1] perfluorooctanesulfonyl fluoride [307-35-7] perfluorooctanesulfonic acid [763-23-1] and tris(perfluoro- -butyl)amine [311-89-7]. 

Tertiary, benzyl, and aHyhc nitro compounds can also be used as Friedel-Crafts alkylating agents eg, reaction of (CH2)3CN02 (2-nitro-2-methyl propane [594-70-7]) with anisole in the presence of SnCl gives 4-/-butylanisole [5396-38-3] (7). SoHd acids, such as perfluorodecanesulfonic acid [335-77-3], and perfluorooctanesulfonic acid [1763-23-1] have been used as catalysts for regio-selective alkylations (8). 

The electrofluorinated organics of principal industrial importance are perfluorooctanoic acid [335-67-1/, CE2(CE2)gCOOH, and perfluorooctanesulfonic acid [1763-23-1/, CE2(CE2)yS02H. Typical conditions for preparation of the latter compound involve batch electrolysis of a 10 wt... 

The POP protocol elaborated on occasion of the Stockholm Convention in 2001 contained 12 compounds, known as the dirty dozen aldrin, chlordane, DDT, dieldrin, endrin, heptachlor, HCB, mirex, PCBs, pol veil I orod i be nzo-/ -d i ox ins. polychlorodibenzofurans and toxaphene. After several years of implementation other compounds, were also included HCHs, PAHs, certain brominated flame retardants, perfluorooctanesulfonic acid (PFOS) and pentachlorobenzene (http // www.chem.unep.ch/pops/). This protocol is aimed to control, reduce and/or eliminate discharges, emissions and spills of POPs into the environment. 

In addition to the electrolytic preparation of fluorine, the electrochemical fluorination of carboxylic acid and sulfonic acid derivatives have also become important industrially. The Simons process (Ni anodes, HF as solvent) has been realized industrially by 3 M 69). The most important products are perfluorooctanecarboxylic and perfluorooctanesulfonic acids, which are used as surfactants and for surface treatments. 

Perfluoroalkylsulfonic acids have the general structure F(CF2) S03H, where typically = 4, 6, 8 or 10 (Table 3.1). The most common PFSA is perfluorooctanesulfonic acid (PFOS, = 8). Given the small pAa values of these compounds, approximately—12 [1], PFSAs dissociate completely in the environment ... 

SYNS PERFLUOROOCTANESULFONIC ACID PFOS SAFETY PROFILE A poison by ingestion. Experimental reproductive effects. When heated to decomposition it emits toxic vapors of SOx and F. ... 

Boric acid esters of phenols have increased reactivity compared with the parent compounds. As such, triaryloxyboranes were glycosylated with glycosyl acetates using catalytic amounts of Yb(OTf)3 [346]. Strong protic acids, such as HCIO4 [45,135,347], perfluorooctanesulfonic acid... 

Chemical Abstracts Service Registry Numbers Perfluorooctanesulfonate, acid (CAS 1763-23-1) Perfluorooctanesulfonyl fluoride (CAS 307-35-7) N-Methylperfluorooctane sulfonamidoethanol (CAS 24448-09-7) N-Ethylperfluorooctanesulfo-namidoethanol (CAS 1691-99-2)... 

We also investigated the impact of different electrode coatings upon the ease of propane oxidation on Ft electrodes in half-cell experiments. In addition to Nafion -H, perfluorooctanesulfonic acid (CgF,7S03H) and... 

It was found that the antioxidant activity of PANI-NFs was higher than that of conventional PANI, and that it increased with decreasing averaged diameter of the nanofibers [182], The enhanced antioxidant activity was due to the increased surface area of PANI-NFs. Conductive 3-D microstructures assembled from PANI-NFs doped with per-fluorosebacic [113,114] and perfluorooctanesulfonic acid [115], such as hollow rambutan-like spheres [115], hollow dandelion-like [113], and hollow box-like microstructures [114], exhibited superhydrophobic properties. Reversible hydrogen storage behavior of PANI-NFs at room temperature has recently been reported [437]. 

Heparin sodium salt. See Heparin sodium Heparin sulfate. See Heparin HEPPS HEPPS. See 3-f4-(Hydroxyethyl)-1-piperazinylj-propanesulfonic acid 1,3,4,6,7,9,9b-Heptaazaphenalene-2,5,8-triamine 1,3,4,6,7,9,9b-Heptaazaphenalene, 2,5,8-triamino-. See Cyamelurotriamide Heptacosafluorotributylamine. See Perfluorotributylamine Heptadecafluorodecahydro (trifluoromethyl) naphthalene. See Perfluoromethyidecalin Heptadecafluorooctane-1-sulfonic acid 1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,8-Heptadecafluoro-1-octanesulfonic acid. See Perfluorooctanesulfonic acid Hepta decafluoro (trifluoromethyl) decalin. See Perfluoromethyidecalin Heptadecane. See n-Heptadecane n-Heptadecane... 

Perfluorooctylsulfonic acid. See Perfluorooctanesulfonic acid (1H,1H,2H,2H-Perfluorooctyl) trichlorosilane. 

Perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) are the two most commonly measured PFASs however, analytical methods have been developed to determine other, shorter and longer chain PFSAs and PFCAs (see Table 13.2 for a list of common PFASs and abbreviations). Recommended terminology and abbreviations have been described by Buck et al, [146]. 

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