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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 water:
15 d
at the temperature of:
25 °C
Half-life in 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.