Registration Dossier
Registration Dossier
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EC number: 610-555-6 | CAS number: 50650-75-4
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:
- 1996-05-02 to 1996-06-04
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study performed acc. to Guideline, is well documented and performed under GLP.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 996
- Report date:
- 1996
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- Deviations:
- not specified
- GLP compliance:
- yes
Test material
- Reference substance name:
- 4-methyl-6-(2,4,4-trimethylpentyl)-2H-pyran-2-one
- EC Number:
- 610-555-6
- Cas Number:
- 50650-75-4
- Molecular formula:
- C14H22O2
- IUPAC Name:
- 4-methyl-6-(2,4,4-trimethylpentyl)-2H-pyran-2-one
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- 30 mg/L dry substance in test system
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 40 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
Reference substance
- Reference substance:
- benzoic acid, sodium salt
Results and discussion
% Degradation
- Parameter:
- % degradation (O2 consumption)
- Value:
- < 20
- Sampling time:
- 28 d
BOD5 / COD results
- Results with reference substance:
- >60% O2 consumption after 14d
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- The test substance under the conditions of this test can be regarded as not readily biodegradable. The degradation remained below 20%.
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