Registration Dossier
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EC number: 204-493-5 | CAS number: 121-69-7
Endpoint summary
Administrative data
Description of key information
Additional information
Biodegradation in water : screening test
No. of studies of target substance N,N-dimethylaniline reviewed for Biodegradation in water: screening tests from reliable sources having Klimisch rating 2 & 4.
The summary of the results are presented below
Sr no. |
Endpoint |
Half life |
Parameter |
Sources |
Result |
1. |
Ready biodegradability |
38 days |
Half life |
Predicted data from PBT profile |
Ready biodegradable |
2. |
Ready biodegradability |
1.3 hours |
50% Biodegradation |
publication |
Ready biodegradable |
3. |
Ready biodegradability |
28 days |
75% biodegradation |
publication |
Ready biodegradable |
4. |
Ready biodegradability |
1.4 hrs |
50% Biodegradation |
Publication RA CAS 91-66-7 |
Ready biodegradable |
Considering the weight of evidence approach and studies reviewed for target chemical N,N-dimethylaniline and read-across chemical N,N-diethylanilineit is concluded that the N,N-dimethylaniline is readily biodegradable in nature.Thus this also confirmed thatthe N,N-dimethylaniline is not persistent in nature. .
Biodegradation in water and sediment: simulation tests:
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.
Biodegradation in soil:
The PBT Profiler & EPI Suite has estimated that N, N-dimethylaniline is expected to be found predominantly in soil and its persistence estimate is based on its availability in this medium. Its half-life in soil is 1800 hrs (75 days). This exceeds the EPA criteria of >= 60 days and therefore, N, N-dimethylaniline is estimated to be persistent in the soil environment.
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