N,N-diethylaniline

Biodegradation in water: screening tests

Link to relevant study record(s)

Reference

Endpoint:

biodegradation in water: ready biodegradability

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: data is from authoritative database (j check)

Justification for type of information:

data is from authoritative database (j check)

Qualifier:

according to guideline

Guideline:

other: referprinciple below

Principles of method if other than guideline:

Biodegradation of test chemical was analysed by BOD and TOC parameter for 14 days by taking activated sludge as a inoculums.

GLP compliance:

not specified

Oxygen conditions:

not specified

Inoculum or test system:

other: activated sludge

Details on inoculum:

- Concentration of sludge:30 mg/L

Duration of test (contact time):

14 d

Initial conc.:

100 mg/L

Based on:

test mat.

Parameter followed for biodegradation estimation:

other: BOD

Parameter followed for biodegradation estimation:

TOC removal

Details on study design:

Standard type

Parameter:

other: BOD

Value:

0

Sampling time:

14 d

Remarks on result:

other: other details not available

Parameter:

% degradation (TOC removal)

Value:

1

Sampling time:

14 d

Remarks on result:

other: other details not available

Details on results:

The test chemical showed 0.0 %, and 1.0 % degradation by BOD, and TOC parameters in two weeks (14 days)

A reference value is indicated as the degree of degradation obtained from direct quantitative analysis because retention after 2 week

(Water + Test Substance) system is 60 - 70%.

Validity criteria fulfilled:

not specified

Interpretation of results:

not readily biodegradable

Conclusions:

The test chemical showed 0.0 % and 1.0 % degradation by BOD and TOC parameters in two weeks (14 days) so it is concluded that test chemical is not readily biodegradable.

Executive summary:

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.

Description of key information

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.

Key value for chemical safety assessment

Biodegradation in water:

under test conditions no biodegradation observed

Additional information

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.