Registration Dossier
Registration Dossier
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EC number: 203-523-4 | CAS number: 107-83-5
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:
- 2 002
- Report date:
- 2002
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
- Version / remarks:
- July 17, 1992
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- 2-methylpentane
- EC Number:
- 203-523-4
- EC Name:
- 2-methylpentane
- Cas Number:
- 107-83-5
- Molecular formula:
- C6H14
- IUPAC Name:
- 2-methylpentane
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, adapted
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- ca. 100 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- Measurement and analysis
(1) Measurement of biochemical oxygen Demand (BOD) by a closed-system oxygen consumption measurement system
(2) Analysis of test substance by Gaschromatography (GC)
Results and discussion
% Degradation
- Key result
- Parameter:
- % degradation (O2 consumption)
- Remarks:
- according BOD resp. GC
- Value:
- ca. 93 - ca. 94
- Sampling time:
- 28 d
BOD5 / COD results
BOD5 / COD
- Key result
- Parameter:
- BOD5
- Value:
- >= 105 - <= 121 mg O2/g test mat.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- Test item (2-methylpentane) is readily biodegradable within 28d.
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