Registration Dossier

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
Study period:
1988
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: according to Zahn-Wellens test)but only results reported

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1988
Report Date:
1988

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method C.9 (Biodegradation: Zahn-Wellens Test)
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent

Study design

Oxygen conditions:
not specified
Inoculum or test system:
not specified
Details on inoculum:
no further detailed information about inoculum used for this Zahn Wellens test
Duration of test (contact time):
28 d
Initial test substance concentrationopen allclose all
Initial conc.:
233 other: mgC/L
Based on:
DOC
Initial conc.:
834 other: mgC/L
Based on:
COD
Reference substance
Reference substance:
not specified

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (DOC removal)
Value:
0
Sampling time:
3 h
Parameter:
% degradation (DOC removal)
Value:
0
Sampling time:
5 d
Parameter:
% degradation (DOC removal)
Value:
0
Sampling time:
10 d
Parameter:
% degradation (DOC removal)
Value:
0
Sampling time:
15 d
Parameter:
% degradation (DOC removal)
Value:
0
Sampling time:
28 d

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Interpretation of results:
under test conditions no biodegradation observed
Conclusions:
The tested substance is not biodegradable.