Registration Dossier
Registration Dossier
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EC number: 201-941-1 | CAS number: 89-80-5
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
Estimation Programs Interface (EPI Suite, 2017) prediction model was run to predict the half-life in water and sediment for the test compound (2R,5S)-5 -methyl-2 -(propan-2 -yl)cyclohexan-1 -one (CAS No. 89 -80 -5). If released in to the environment, 24.8% of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period of (2R,5S)-5-methyl-2-(propan-2-yl)cyclohexan-1-one in water is estimated to be 15 days (360 hrs). The half-life (15 days estimated by EPI suite) indicates that the chemical is not persistent in water and the exposure risk to aquatic animals is moderate to low whereas the half-life period of (2R,5S)-5-methyl-2-(propan-2-yl)cyclohexan-1-one in sediment is estimated to be 135 days (3240 hrs). However, as the percentage release of test chemical into the sediment is less than 1% (i.e, reported as 0.179%), indicates that (2R,5S)-5-methyl-2-(propan-2-yl)cyclohexan-1-one is not persistent in sediment.
Key value for chemical safety assessment
- Half-life in freshwater:
- 15 d
- at the temperature of:
- 25 °C
- Half-life in freshwater sediment:
- 135 d
- at the temperature of:
- 25 °C
Additional information
Estimation Programs Interface (EPI Suite, 2017) prediction model was run to predict the half-life in water and sediment for the test compound (2R,5S)-5 -methyl-2 -(propan-2 -yl)cyclohexan-1 -one (CAS No. 89 -80 -5). If released in to the environment, 24.8% of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period of (2R,5S)-5-methyl-2-(propan-2-yl)cyclohexan-1-one in water is estimated to be 15 days (360 hrs). The half-life (15 days estimated by EPI suite) indicates that the chemical is not persistent in water and the exposure risk to aquatic animals is moderate to low whereas the half-life period of (2R,5S)-5-methyl-2-(propan-2-yl)cyclohexan-1-one in sediment is estimated to be 135 days (3240 hrs). However, as the percentage release of test chemical into the sediment is less than 1% (i.e, reported as 0.179%), indicates that (2R,5S)-5-methyl-2-(propan-2-yl)cyclohexan-1-one is not persistent in sediment.
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