1.2- Dibromoethane EDB

For the determination of 1,2-dibromoethane (EDB) and l,2-dibromo-3-chloropro-pane (DBCP) in water by hexane microextraction and GC... 

Reed NR, Narloch BA, Olsen HE, et al. 1987. Health risk assessment of 1,2-dibromoethane (EDB) in California drinking water. Gov Rep Announce Index. Davis, CA California Public Health Foundation. Order No. PB88-169701, 168. 

Sawhney BL, Pignatello JJ, Steinberg SM. 1988. Determination of 1,2-dibromoethane (EDB) in field soils Implications for volatile organic compounds. J Environ Qual 17 149-152. 

Scott BR, Sparrow AJ, Schwemmer SS, et al. 1978. Plant metabolic activation of 1,2-dibromoethane (EDB) to a mutagen of greater potency. Mutat Res 49 203-212. 

Dibromoethane (EDB), l,2-Dibromo-3-chloropropane(DCP), and l,2,3-trichloropropane(123TCP)inWaterby... 

Synonyms 1,2-Dibromoethane EDB Physical Form. Clear liquid... 

What Products Do You Expect from Microbial Degradation of 1,2-Dibromoethane (EDB )... 

Synonyms 1,2-dibromoethane, EDB Formula BrCH2CH2Br MW 187.88 CAS [106-93-4] used in fumigant and antiknock gasolines colorless heavy liquid chloroform odor boils at 131°C freezes at 10°C vapor pressure 11 torr at 20°C density 2.7 g/mL at 25°C slightly soluble in water (0.4%) miscible with alcohol and ether irritant and toxic. 

Steinberg et al. (1987) studied the persistence of 1,2-dibromoethane (EDB) in soils and found that low amounts of the organic were released with time, particularly if EDB had not been freshly added to the soil (Fig. 6.3). They suggested that the slow release rate was due to EDB being trapped in soil micropores where release is influenced by extreme tortuosity and/or steric restrictions. It was estimated that based on a radial diffusion model, 23 and 31 years would be required for a 50% equilibrium in EDB release to occur from two Connecticut soils. The previous studies point out that while sorption of pesticides is usually rapid and often reversible in the laboratory, extraction from field soils is extremely slow and often requires multiple extractions or even chemical dissolution of the soil matrix. 

Figure 5 Chemical reactions leading to the dehalo-genation of a 1,2-dihaloethane (X = Br for 1,2-dibromoethane (EDB), X = Cl for 1,2-dichloroethane) in an aqueous solution containing the bisulfide anion (HS ) and one or more additional nucleophiles (Nu ) that react with the compound via nucleophilic substitution (e.g., nitrate, hydroxide or a buffer conjugate base), or bases (B ) that react via dehydrohaloge-nation (e.g., hydroxide or a buffer conjugate base) (after Barbash, 1993).

Barbash J. E. and Reinhard M. (1992b) The influence of pH buffers and nitrate concentration on the rate and pathways of abiotic transformation of 1,2-dibromoethane (EDB) in aqueous solution. Prep. Ext. Abstr. Am. Chem. Soc. Div. Environ. Chem. 32(1), 674-677. 

Katz B. G. (1993) Biogeochemical and Hydrological Processes Controlling the Transport and Fate of 1,2-Dibromoethane (EDB) in Soil and Ground Water, Central Florida. US Geological Survey, Water-Supply Paper 2402, Tallahassee, Honda, 35p. 

Moye HA, Weintraub RA, Jex GW. 1986. Fate of 1,2-dibromoethane (EDB) in the subsurface environment [Abstract]. Abstr Pap Am Chem Soc 191 ENVR 5. 

Dibromoethane (EDB) is used as a fumigant for grains, in antiknock gasolines, as a solvent, and in organic synthesis. 

Katz B. G. (1993) Bio geochemical and hydrological processes controlling the transport and fate of 1,2-dibromoethane (EDB) in soil and ground water. New York Water-Supply Paper 2402. U.S. Geol. Survey, 35 p. 

Figure 12 Arrhenius plot for the second-order rate constant ( hs-) for the nucleophilic displacement of bromide from 1,2-dibromoethane (EDB) by bisulfide ion (HS ) (after Barbash, 1993).

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