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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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