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:
03 September 2008 - 02 October 2008.
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Test performed in accordance with OECD guidelines.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2008
Report Date:
2008

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
Qualifier:
according to
Guideline:
ISO DIS 9439 (Ultimate Aerobic Biodegradability - Method by Analysis of Released Carbon Dioxide)
Qualifier:
according to
Guideline:
EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: crystalline
Details on test material:
Substance type: white powder
- Physical state: solid
- Analytical purity: 99.80%
- Expiration date of the lot/batch: 31 Jan 2009
- Storage condition of test material: At room temperature in the dark

Study design

Oxygen conditions:
aerobic
Inoculum or test system:
activated sludge, domestic, non-adapted
Duration of test (contact time):
> 0 - < 28 d

Results and discussion

% Degradation
Remarks on result:
other: The test substance is not readily biodegradable under the conditions of the modified Sturm test.
Details on results:
The relative biodegradation values calculated from the measurements performed during the test period revealed no significant biodegradation of the test substance. In the toxicity control, the test substance was found not to inhibit mircrobial activity. In conclusion the test substance is designated as not readily biodegradable.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Interpretation of results:
under test conditions no biodegradation observed
Conclusions:
The test substance is designated as not readily biodegradable.
Executive summary:

The relative biodegradation values calculated from the measurements performed during the test period revealed no significant biodegradation of the test substance. In the toxicity control, the test substance was found not to inhibit mircrobial activity. In conclusion the test substance is designated as not readily biodegradable.