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Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

Estimation Programs Interface (EPI) Suite (2016) prediction model was run to predict the half-life in water and sediment for the test compound Pyrazolone T (CAS no. 118 -47 -8). Half-life of Pyrazolone T in water is estimated to be 15 days (360 hrs) while in sediment it is 134 days (3240 hrs).  Based on these half-life value of Pyrazolone T, it is concluded that the chemical is not persistent in water but 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:
134 d
at the temperature of:
25 °C

Additional information

Estimation Programs Interface (EPI) Suite (2016) prediction model was run to predict the half-life in water and sediment for the test compound Pyrazolone T (CAS no. 118 -47 -8). Half-life of Pyrazolone T in water is estimated to be 15 days (360 hrs) while in sediment it is 134 days (3240 hrs). Based on these half-life value of Pyrazolone T, it is concluded that the chemical is not persistent in water but persistent in sediment.