Registration Dossier
Registration Dossier
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EC number: 204-493-5 | CAS number: 121-69-7
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
According to the standard information requirements in Annex IX point 9.2.1.3 column 2, this endpoint is considered for waiver,since the substance N,N-diethylaniline is readily biodegradable waiver is proposed for this endpoint.
Key value for chemical safety assessment
- Half-life in freshwater:
- 37.5 d
- at the temperature of:
- 25 °C
- Half-life in freshwater sediment:
- 337.5 d
- at the temperature of:
- 25 °C
Additional information
Based on the Level III Fugacity Model, the half life period of N, N-dimethylaniline was estimated. Half life period of N, N-dimethylaniline in water is observed to be 37.5 days (900 hrs.) while in sediment it is 337.5 days (8100 hrs.).Based on these half life values of N, N-dimethylaniline, it is concluded that the chemical is readily biodegradable in water where as it is non biodegradable in sediment. However, since there is very less diffusion of the substance in the sediment as evident from the reported data (0.141% in sediment) and hence persistence in the sediment compartment is not likely to be critical.
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