| Umweltverhalten | Aquatic Fate: Allyl chloride analogs are hydrolyzed in water. The most likely products of 3,4 dichloro-1-butene are: 4-chloro-3-hydroxy-1-butene, 4-chloro-1-hydroxy-2-butene, and 3,4-dihydroxy-1-butene.TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 160(SRC), determined from a measured water solubility of 420 mg/l(2) and a regression-derived equation(3), indicates that 3,4-dichloro-1-butene is expected to have high mobility in soil(SRC). Volatilization of 3,4-dichloro-1-butene from moist soil surfaces is expected to be an important fate process(SRC) given an estimated Henry's Law constant of 8.6X10-3 atm-cu m/mole(SRC), based upon its vapor pressure, 21.9 mm Hg(4), and water solubility, 420 mg/l(2). The potential for volatilization of 3,4-dichloro-1-butene from dry soil surfaces may exist based upon its vapor pressure(4). The neutral hydrolysis half-life of a similar compound, 1,4-dichloro-2-butene, has been measured as 3.2 days(5). This suggests that 3,4-dichloro-1-butene may also undergo hydrolysis in moist soils(SRC).AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 160(SRC), determined from a measured water solubility of 420 mg/l(2) and a regression-derived equation(3), indicates that 3,4-dichloro-1-butene is not expected to adsorb to suspended solids and sediment(SRC). Volatilization from water surfaces is expected(3) based upon an estimated Henry's Law constant of 8.6X10-3 atm-cu m/mole(SRC), based upon its vapor pressure, 21.9 mm Hg(4), and water solubility, 420 mg/l(2). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 1 hour and 4.5 days, respectively(SRC). According to a classification scheme(5), a BCF range of 0.59 to 13.3(7), suggests bioconcentration in aquatic organisms is low. The neutral hydrolysis half-life of a similar compound, 1,4-dichloro-2-butene, has been measured as 3.2 days(6). This suggests that 3,4-dichloro-1-butene may also undergo hydrolysis in water(SRC).ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), 3,4-dichloro-1-butene, which has a vapor pressure of 21.9 mm Hg at 25 °C(2), is expected to exist solely as a vapor in the ambient atmosphere. Vapor-phase 3,4-dichloro-1-butene is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals and ozone molecules(SRC). The half-life for the reaction in air with hydroxyl radicals is estimated to be 19 hours(SRC), calculated from its rate constants of 2X10-11 cu cm/molecule-sec at 25 °C(SRC) using a structure estimation method(3). The half-life for the reaction in air with ozone is estimated to be 23 hours(SRC), calculated from its rate constants of 1.2X10-17 cu cm/molecule-sec at 25 °C(SRC) using a structure estimation method(3). |
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