Registration Dossier

Environmental fate & pathways

Biodegradation in water: screening tests

Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
unknown
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1997
Report date:
1997

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
GLP compliance:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
-
EC Number:
423-370-9
EC Name:
-
Cas Number:
10097-09-3
Molecular formula:
C19H24N4O2
IUPAC Name:
1-[4-({4-[(dimethylcarbamoyl)amino]phenyl}methyl)phenyl]-3,3-dimethylurea
impurity 1
Reference substance name:
unknown
IUPAC Name:
unknown
impurity 2
Chemical structure
Reference substance name:
Water
EC Number:
231-791-2
EC Name:
Water
Cas Number:
7732-18-5
Molecular formula:
H2O
IUPAC Name:
Water
Test material form:
solid: bulk

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge (adaptation not specified)
Duration of test (contact time):
28 d

Results and discussion

Preliminary study:
Not applicable.
Test performance:
No unusual observations during test affecting results.
% Degradationopen allclose all
Key result
Parameter:
% degradation (DOC removal)
Value:
0
Sampling time:
1 d
Key result
Parameter:
% degradation (DOC removal)
Value:
13
Sampling time:
6 d
Key result
Parameter:
% degradation (DOC removal)
Value:
18
Sampling time:
16 d
Key result
Parameter:
% degradation (DOC removal)
Value:
26
Sampling time:
22 d
Key result
Parameter:
% degradation (DOC removal)
Value:
31
Sampling time:
28 d
Details on results:
No further details reported.

BOD5 / COD results

Results with reference substance:
Not applicable, no reference substance tested.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
not readily biodegradable
Conclusions:
MDI-Urone is not readily biodegradable under the conditions of the test.
Executive summary:

MDI-Urone is not readily biodegradable under the conditions of the test.