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Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Endpoint:
biodegradation in water: ready biodegradability
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Test was conducted according to OECD 301B resp. EU C.4.C and compliant with GLP. Read-across from supporting substance (structure analogue or surrogate). Test substance (source substance): CAS No. 135452-43-6

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013
Report Date:
2013

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
Qualifier:
according to
Guideline:
EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
GLP compliance:
yes (incl. certificate)

Test material

Reference
Name:
Unnamed
Type:
Constituent
Type:
Constituent
Type:
Constituent
Test material form:
solid: particulate/powder
Remarks:
migrated information: powder

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, adapted
Duration of test (contact time):
28 d
Initial test substance concentration
Initial conc.:
26.1 mg/L
Parameter followed for biodegradation estimation
Parameter followed for biodegradation estimation:
CO2 evolution

Results and discussion

% Degradation
Parameter:
% degradation (CO2 evolution)
Value:
1.3
Sampling time:
28 d

Any other information on results incl. tables

Degradation of the positive control was 67.2% after fourteen days.

The following data were determined for the test item:

10-day-window: not detected

degradation at the end of 10-day-window: none

degradation at the end of the test: 1.3%

pass level following guideline: 60% at the end of 10-day-window.

Since no 10-day-window was detected and degradation did not surpass 60% throughout the test, the test item is stated as not biodegradable within 28 days following OECD 301B/EU C.4.-C.

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.