Registration Dossier
Registration Dossier
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EC number: 247-865-2 | CAS number: 26638-53-9
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:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 013
- Report date:
- 2013
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Version / remarks:
- Commission Regulation (EC) No. 440/2008 of 30 May 2008, Part C: Methods for the determination of ecotoxicity, Publication No. L142, C.4. "Biodegradation: determination of the 'ready' biodegradability, C.4-C: Carbon dioxide (CO2) evolution test (Modified Sturm Test).
• ISO Standard 9439 “Water Quality - Evaluation of ultimate aerobic biodegradability of organic compounds in aqueous medium - carbon dioxide evolution test (1999).
• ISO Standard 10634 "Water Quality - Guidance for the preparation and treatment of poorly water-soluble organic compounds for the subsequent evaluation of their biodegradability in an aqueous medium" (1995).
- GLP compliance:
- yes
Test material
- Test material form:
- solid: particulate/powder
Constituent 1
Study design
- Inoculum or test system:
- activated sludge, adapted
- Details on inoculum:
- Source: The source of test organisms was activated sludge freshly obtained from a municipal sewage treatment plant: 'Waterschap Aa en Maas', Heeswijk-Dinther, The Netherlands, receiving predominantly domestic sewage.
Treatment: The freshly obtained sludge was kept under continuous aeration until further treatment. The concentration of suspended solids was 3.7 g/l in the concentrated sludge (information obtained from the municipal sewage treatment plant). Before use, the sludge was allowed to settle (36 minutes) and the supernatant liquid was used as inoculum at the amount of 10 ml/l of mineral medium.
Results and discussion
% Degradation
- Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- >= 4 - <= 11
- Sampling time:
- 10 d
Applicant's summary and conclusion
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- 1574 CETONA was not readily biodegradable under the conditions of the modified Sturm test presently performed.
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