Registration Dossier

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
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP study according EU/OECD guideline.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1998

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method C.4-D (Determination of the "Ready" Biodegradability - Manometric Respirometry Test)
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
1,1-diphenylethylene
EC Number:
208-482-6
EC Name:
1,1-diphenylethylene
Cas Number:
530-48-3
Molecular formula:
C14H12
IUPAC Name:
1,1'-ethene-1,1-diyldibenzene

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, non-adapted
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
34.5 - 35 mg/L

Results and discussion

% Degradationopen allclose all
Parameter:
% degradation (O2 consumption)
Remarks:
mean values
Value:
4
Sampling time:
8 d
Parameter:
% degradation (O2 consumption)
Remarks:
mean values
Value:
5
Sampling time:
14 d
Parameter:
% degradation (O2 consumption)
Remarks:
mean values
Value:
8
Sampling time:
21 d
Parameter:
% degradation (O2 consumption)
Remarks:
mean values
Value:
12
Sampling time:
28 d

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
under test conditions no biodegradation observed
Conclusions:
The test substance is not readily biodegradable under the conditions of this test. Significant biodegradation was not detected.

Categories Display