5-chloro-o-toluidine

Biodegradation in water: screening tests

Administrative data

Endpoint:

biodegradation in water: inherent biodegradability

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1992

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 302 B (Inherent biodegradability: Zahn-Wellens/EMPA Test)

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

5-chloro-o-toluidine

EC Number:

202-452-6

EC Name:

5-chloro-o-toluidine

Cas Number:

95-79-4

Molecular formula:

C7H8ClN

IUPAC Name:

5-chloro-2-methylaniline

Study design

Oxygen conditions:

aerobic

Inoculum or test system:

other: sludge of domestic and industrial STP 1:1

Duration of test (contact time):

55 d

Initial test substance concentration

Initial conc.:

593 mg/L

Based on:

COD

Parameter followed for biodegradation estimation

Parameter followed for biodegradation estimation:

other: COD-Removal

Results and discussion

% Degradation

% Degradation 1

Parameter:

% degradation (O2 consumption)

Value:

>= 30

Sampling time:

10 d

% Degradation 2

Parameter:

% degradation (O2 consumption)

Value:

>= 68

Sampling time:

28 d

% Degradation 3

Parameter:

% degradation (O2 consumption)

Value:

> 95

Sampling time:

55 d

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Interpretation of results:

inherently biodegradable