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Environmental fate & pathways

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Calculated logKoc values of 0.51 and 0.67 are available based on estimates using the MCI and log Kow model from KOCWIN v2.0, respectively (BASF SE, KOCWIN v2.00, 2012). Based on these results the substance is not expected to adsorb to suspended solids and sediment.

From the water surface the substance will slowly evaporate into the atmosphere as was demonstrated by a Henry Law Constant of 15 Pa*m3/mol as reported in the experimental database of EPISuite 4.1 (Conway et al., 1983). This value is in accordance to the Henry's Law Constant of 12.2 determined in a HENRYWIN v3.20 calculation (BASF SE, 2012). Based on a Mackay Level I calculation for ethylene oxide a distribution of the substance predominately into surface water and air is expected. A Fugacity level III calculation with emissions of 1000 kg/h into the compartments air, water and soil each resulted in a persistence time of 266 h and a reaction time of 853 h. The half-lives determined for air, water, soil and sediment were 5066, 360, 720 and 3240 hours, respectively. The mass amount calculated was 21.8, 40.5, 37.6 and 0.08 % for the compartments air, water, soil and sediment, respectively.