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EC number: 609-051-9 | CAS number: 35000-37-4
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:
- 10.01.2008 to 01.04.2008
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: GLP guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 008
- Report date:
- 2008
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- [2-(tert-butoxy)-2-oxoethyl]triphenylphosphanium chloride
- EC Number:
- 609-051-9
- Cas Number:
- 35000-37-4
- Molecular formula:
- C24H26ClO2P
- IUPAC Name:
- [2-(tert-butoxy)-2-oxoethyl]triphenylphosphanium chloride
- Test material form:
- solid: particulate/powder
- Remarks:
- migrated information: powder
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, predominantly domestic (adaptation not specified)
- Duration of test (contact time):
- 28 d
Initial test substance concentrationopen allclose all
- Initial conc.:
- 17 mg/L
- Based on:
- test mat.
- Initial conc.:
- 12 mg/L
- Based on:
- other: TOC/l
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- CO2 evolution
Reference substance
- Reference substance:
- acetic acid, sodium salt
Results and discussion
% Degradation
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 9
- Sampling time:
- 28 d
BOD5 / COD results
- Results with reference substance:
- The reference substance was degraded by at least 60% (72%) within 14 days.
Any other information on results incl. tables
In the toxicity control more than 25% degradation occurred within 14 days (33%). Therefore, the test item was assumed not to inhibit microbial activity.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- DCM was not readily biodegradable under the conditions of the modified Sturm test.
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