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Registration Dossier
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EC number: 251-347-1 | CAS number: 33021-02-2
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: guideline study, validity criteria fulfilled;
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 002
- Report date:
- 2002
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 310 (Ready Biodegradability - CO2 in Sealed Vessels (Headspace Test)
- Principles of method if other than guideline:
- ISO 14593 - CO2-Headspace Test
- GLP compliance:
- yes
Test material
- Reference substance name:
- 1-(1,1-dimethylethoxy)-2-methylpropane
- EC Number:
- 251-347-1
- EC Name:
- 1-(1,1-dimethylethoxy)-2-methylpropane
- Cas Number:
- 33021-02-2
- Molecular formula:
- C8H18O
- IUPAC Name:
- 1-(tert-butoxy)-2-methylpropane
- Details on test material:
- - Test substance: Isobutyl-tert-Butylether,
- purity: 86.4%
- physical form: liquid
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic (adaptation not specified)
- Details on inoculum:
- - inoculum: Activated sludge from a laboratory wastewater plant treating municipal sewage .
- Concentration of dry substance: 4 mg/I - Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 27.4 mg/L
- Based on:
- test mat.
Reference substance
- Reference substance:
- aniline
Results and discussion
% Degradation
- Parameter:
- % degradation (CO2 evolution)
- Value:
- < 10
- Sampling time:
- 28 d
- Details on results:
- Kinetic of test substance (in %):
ca. 5 after 7 day(s)
ca. 5 after 14 day(s)
ca. 4 after 21 day(s)
ca. 3 after 28 day(s)
Kinetic of control substance (in %):
ca. 80 ... 90 after 14 day(s)
Any other information on results incl. tables
Test substance: volatile, no DOC values were measured;
Applicant's summary and conclusion
- Interpretation of results:
- under test conditions no biodegradation observed
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