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2 : 6-Dichloro phenol

Figure 7 Direct photochemical reaction pathway of Triclosan (5-chloro-2-(2,4-di-chlorophenoxy)phenol) in natural water (3-100 iM of Triclosan in pH-bujfered solutions), irradiated with a Hg-vapour lamp. Only the triclosan phenolate anion (present in water at pH >8) is susceptible to significant photochemical transformation and will also react through indirect photolysis (not shown) with singlet oxygen ( O2) and OH radicals to form 2,4-dichloro-phenol (2,4-DCP). The photoproduct 2,8-dichlorodibenzo-p-dioxin (2,8-DCDD) belongs to a notoriously persistent group of chemicals commonly referred to as dioxins ... Figure 7 Direct photochemical reaction pathway of Triclosan (5-chloro-2-(2,4-di-chlorophenoxy)phenol) in natural water (3-100 iM of Triclosan in pH-bujfered solutions), irradiated with a Hg-vapour lamp. Only the triclosan phenolate anion (present in water at pH >8) is susceptible to significant photochemical transformation and will also react through indirect photolysis (not shown) with singlet oxygen ( O2) and OH radicals to form 2,4-dichloro-phenol (2,4-DCP). The photoproduct 2,8-dichlorodibenzo-p-dioxin (2,8-DCDD) belongs to a notoriously persistent group of chemicals commonly referred to as dioxins ...
DICHLORO-PHENOL-O-ESTER with 0,0-DIETHYL PHOSPHOROTHIOATE see DFK600 (2,4-DICHLOROPHENOXY)ACETIC ACID, ISOPROPYL ESTER see lOYOOO (2-4-DICHLOROPHENOXY)ACETIC ACID-1-METHYLETHYL ESTER (9CI) see lOYOOO... [Pg.1621]

Figure 7.13 Separation of chlorophenols on styrene-divinylbenzene resin (reproduced by permission of Hamilton). Conditions column, 15cm x 4.2 mm i.d. stationary phase, PRP-1, lOpm mobile phase, 0.1 N Na3PO4 (pH 12)/acetonitrile (2 5), 2mlmin UV detector, 254nm. Peaks 1 = 4-chlorophenol 2 = 2,4-dichloro-phenol 3 — 2,4,5- and 2,4,6-trichlorophenol 4 — 2,3,5,6-tetrachloro-phenol 5 = pentachlorophenol. Figure 7.13 Separation of chlorophenols on styrene-divinylbenzene resin (reproduced by permission of Hamilton). Conditions column, 15cm x 4.2 mm i.d. stationary phase, PRP-1, lOpm mobile phase, 0.1 N Na3PO4 (pH 12)/acetonitrile (2 5), 2mlmin UV detector, 254nm. Peaks 1 = 4-chlorophenol 2 = 2,4-dichloro-phenol 3 — 2,4,5- and 2,4,6-trichlorophenol 4 — 2,3,5,6-tetrachloro-phenol 5 = pentachlorophenol.
Dichloro- phenol Bu. of Mines approved respirator, rubber gloves, chemical goggles. Rest. ... [Pg.315]

Dichloro- phenol 237 200 Data not available Data not available Water, foam, carbon dioxide, dry chemical Water or foam may cause frothing Solid melts and bums Data not available No ... [Pg.436]

D. On a large scale it is prepared mainly by the condensation of 2,4-dichloro-phenol with the sodium or ammonium salt of monochloroacetic acid in aqueous or nonaqueous medium ... [Pg.505]

The "solution-diffusion" model explains why molecules larger than salt sometimes pass through an RO membrane more readily. For example, cellulose acetate membranes which show a 95% rejection for NaCI (MW 58) and a 99% rejection for dextrose (MW 180), show a negative -34% rejection for 2,4-dichloro-phenol (MW 163). This means the dichlorophenol passes through the membrane more readily than water. This is hard to explain with a "pore-flow" sieving mechanism. [Pg.162]

Dichlorohydroxybenzene 2,4-Dichloro-phenol EINECS 204 429-6 HSDB 1139 1-Hydroxy-2,4-dichlorobenzene NCI-C55345 NSC 2879 Phenol, 2,4-dichloro- RCRA waste number U081. Needles mp = 46" bp = 210" >.m = 211, 229, 287 nm (c = 6680, 6660, 2450, MeOH) slightly soluble In H2O, soluble In EtOH, El20, C6H6, CHCI3,... [Pg.201]

Chlorophenols (2-chlorophenol,2,4-dichloro-phenol, pentachlorophenol) Chlorophenylphenyl ether DDT and metabolites... [Pg.906]

Batch time lowered by a factor of 2 catalyst loading reduced by factor of 2 Solventless system increases productivity as compared to conventional stirred tank reactor. Reaction time reduced by 80% yield increased from 83 to 94% Appropriate design of venturi loop reactor reduces chlorination batch time by a factor of 5-7 from 20 to 40 h required in a conventional stirred tank reactor. Highly efficient heat transfer in the external loop affords nearly isothermal operation at 45-50 °C, resulting in a high yield (more than 90%) of 2,4-dichloro phenol while suppressing formation of 2,6 dichloro phenol. Efficient removal of reaction by-product (hydrogen chloride) in the external gas circuit (Fig. 8.3) improves the yield Almost complete conversion of methanol in less than 1 h... [Pg.322]

Another important plant protection agent based on 2,4-dichlorophenol is di-clofop-methyl, which is produced via the intermediate nitrofen (from 2,4-dichloro-phenol and p-nitrochlorobenzene) by reduction of the nitro group, diazotization, and hydrolysis of the diazonium salt to yield the phenol with subsequent reaction with 2-chloropropionic acid methyl ester. [Pg.178]

Malato, S., J. Blanco, P. Femadez-Ibanez, and J. Caceres, Treatment of 2,4-dichloro-phenol by solar photocatalysis Comparison of coupled photocatalytic-active carbon vs. active carbon. J. Solar Energy Eng. 123 (2001) 138-142. [Pg.261]

Hay,A.G Rice, J. F. Applegate,B. M. Biight,N. G. Sayler,G. S. Abioluminescent whole-cell reporter for detection of 2,4-dichlorophenoxyacetic acid and 2,4-dichloro-phenol in soil. Appl Environ Microbiol October 2000, 66(10), 4589-4594. [Pg.202]

Preparation by Friedel-Crafts reaction of propionyl chloride with 2,4-dichloro-phenol in the presence of aluminium chloride [6391],... [Pg.1744]

See other pages where 2 : 6-Dichloro phenol is mentioned: [Pg.95]    [Pg.2]    [Pg.1472]    [Pg.301]    [Pg.318]    [Pg.365]    [Pg.761]    [Pg.762]    [Pg.763]    [Pg.765]    [Pg.908]    [Pg.909]    [Pg.920]    [Pg.64]    [Pg.170]    [Pg.480]    [Pg.81]    [Pg.66]    [Pg.667]    [Pg.175]   


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