N,N-diethylaniline

Endpoint summary

Description of key information

Biodegradation in water:

The test chemical was subjected to biodegradation test by taking sludge as inoculums at 30 mg/L concentration. Biodegradation was analyzed by using two parameters that are BOD and TOC. The initial concentration of test chemical was 100 mg/L and study design was of standard type. After 2 weeks test chemical showed 0.0%, and 1.0 % degradation by   BOD and parameter respectively in two weeks (14 days).On the basis of % degradation values it is concluded that test chemical is not readily biodegradable.

Biodegradation in water and sediments:

Estimation Programs Interface (EPI Suite, 2018) prediction model was run to predict the half-life in water and sediment for the test chemical . If released in to the environment, 83  % of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period of test chemical in water is estimated to be 37.5 days ( 900  hrs). The half-life ( 37.5 days estimated by EPI suite) indicates that the chemical is not persistent in water and the exposure risk to aquatic animals is low whereas the half-life period of test chemical in sediment is estimated to be 337.5 days (8100 hrs). However, as the percentage release of test chemical into the sediment is less than 1% (i.e, reported as 0.268 %), indicates that test chemical is not persistent in sediment

Biodegradation in soil:

The half-life period of test chemical in soil was estimated using Level III Fugacity Model by EPI Suite version 4.1 estimation database (EPI suite, 2018). If released into the environment, 83 % of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of test chemical in soil is estimated to be 75 days (1800 hrs). Based on this half-life value of test chemical, it is concluded that the chemical is not persistent in the soil environment and the exposure risk to soil dwelling animals is low .

Additional information

Biodegradation in water:

Various experimental studies have been reviewed for test chemical for biodegradation in water endpoint and their results are summarized below.

The first experimental study have been reviewed from authoritative database ( J check) in this study the test chemical was subjected to biodegradation test by taking sludge as inoculums at 30 mg/L concentration. Biodegradation was analyzed by using two parameters that are BOD and TOC. The initial concentration of test chemical was 100 mg/L and study design was of standard type. After 2 weeks test chemical showed 0.0%, and 1.0 % degradation by   BOD and parameter respectively in two weeks (14 days).On the basis of % degradation values it is concluded that test chemical is not readily biodegradable.

Next study was reviewed from Sewage and Industrial Wastes journal (1955) in this study the biodegradation experiment was performed by using to OECD test guideline 301C. The percent degradation of test chemical was determined to be 0.0% in 14 days by using activated sludge as inoculum. On the basis of percent degradation value it is concluded that test chemical is not readily biodegradable in nature.

Another study was reviewed from secondary source in this study the percent biodegradation of test chemical was determined to be 0.0% by using BOD as parameter and sewage as inoculums in 5 days at 20 oC. On the basis of percent degradation value it is concluded that test chemical is not readily biodegradable in nature.

By considering results of all the studies mentioned above it is concluded that test chemical is not readily biodegradable.

Biodegradation in water and sediments:

Estimation Programs Interface (EPI Suite, 2018) prediction model was run to predict the half-life in water and sediment for the test chemical . If released in to the environment, 83  % of the chemical will partition into water according to the Mackay fugacity model level III and the half-life period of test chemical in water is estimated to be 37.5 days ( 900  hrs). The half-life ( 37.5 days estimated by EPI suite) indicates that the chemical is not persistent in water and the exposure risk to aquatic animals is low whereas the half-life period of test chemical in sediment is estimated to be 337.5 days (8100 hrs). However, as the percentage release of test chemical into the sediment is less than 1% (i.e, reported as 0.268 %), indicates that test chemical is not persistent in sediment

Biodegradation in soil:

The half-life period of test chemical in soil was estimated using Level III Fugacity Model by EPI Suite version 4.1 estimation database (EPI suite, 2018). If released into the environment, 83 % of the chemical will partition into soil according to the Mackay fugacity model level III. The half-life period of test chemical in soil is estimated to be 75 days (1800 hrs). Based on this half-life value of test chemical, it is concluded that the chemical is not persistent in the soil environment and the exposure risk to soil dwelling animals is low .