The biological concentration potential in DBEEA organisms is medium

According to the classification scheme, the estimated Koc value is 1400, which is determined by the estimated log Kow of 3.24 (2, SRC) and a regression equation, indicating that the mobility of DBEEA in soil is low. According to the fragment constant estimation method, Henry's law constant is estimated to be 3.1 x10 - 13atm cu/mol, and the volatilization of DBEEA from the wet soil surface is not an important fate process. Based on the estimated vapor pressure of 9.8X10-8 mm Hg determined by the fragment constant method, DBEEA is not expected to volatilize from the surface of dry soil. DBEEA exists at a concentration of 100 mg/l and reaches 86% of its theoretical BOD within 4 weeks after using activated sludge inoculant, indicating that the compound may be biodegradable in soil.

According to the classification scheme, the estimated Koc value is 1400, which is determined by the estimated log Kow of 3.24 (2, SRC) and a regression equation, indicating that DBEEA is expected to adsorb on suspended solids and sediments in water. According to the Henry's law constant of 3.1 x10 - 13atm cu/mol estimated by using the fragment constant estimation method, the prediction of volatilization from water surface is not an important fate process. The second order rate constant of alkali catalyzed hydrolysis was estimated to be 0.27 L/mol sec by the structure estimation method; At pH 7 and 8, the half-life is 294 and 29 days, respectively. According to the classification scheme, BCF is estimated to be 62 by the equation derived from the estimated log Kow and regression, indicating that the biological concentration potential of aquatic organisms is medium. DBEEA, with a concentration of 100 mg/l, reached 86% of its theoretical BOD within 4 weeks after using activated sludge inoculant, indicating that the compound may be biodegradable in water.

According to the gas/particle distribution model of semi volatile organic compounds in the atmosphere, the vapor pressure of DBEEA at 25 ° C is estimated to be 9.8X10-8 mm Hg, which is expected to exist in both vapor and particle phases in the atmosphere. Gas phase DBEEA reacts and degrades with photochemical hydroxyl radicals in the atmosphere; The half-life of the reaction in air is estimated to be 5 hours, and the calculated rate constant is 7.4 × 10-11 cu cm/molecular second, determined at 25 ° C using the structure estimation method. DBEEA may also be photolyzed directly in the environment because the compound contains a functional group that can absorb light greater than 290 nm. The particulate phase DBEEA can be removed from the air by wet and dry deposition.

DBEEA exists at a concentration of 100 mg/l, and reaches 86% of its theoretical BOD within 4 weeks using 30 mg/l activated sludge inoculant and MITI test in Japan, indicating rapid biodegradation.

The gas phase reaction rate constant of DBEEA with photochemical hydroxyl radical was estimated to be 7.4 by the structure estimation method × 10-11 cu cm/molecular second. This is equivalent to the atmospheric half-life of about 5 hours when the atmospheric concentration is 5X10+5 hydroxyl groups per cubic centimeter. The second order rate constant of alkali catalyzed hydrolysis was estimated to be 0.27 L/mol sec by the structure estimation method; At pH 7 and 8, the half-life is 294 and 29 days, respectively. DBEEA may also be photolyzed directly in the environment because the compound contains a functional group that can absorb light greater than 290 nm.

Using the estimated logkow of 3.24 (1, SRC) and the regression equation, the BCF of DBEEA is 62. According to the classification scheme, the BCF shows that the biological concentration potential in aquatic organisms is medium.

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