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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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