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Diss Factsheets

Environmental fate & pathways

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

Constituent 1
Chemical structure
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

% Degradationopen allclose all
Parameter:
% degradation (O2 consumption)
Value:
>= 30
Sampling time:
10 d
Parameter:
% degradation (O2 consumption)
Value:
>= 68
Sampling time:
28 d
Parameter:
% degradation (O2 consumption)
Value:
> 95
Sampling time:
55 d

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
inherently biodegradable