Registration Dossier
Registration Dossier
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EC number: 700-805-3 | CAS number: -
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:
- 2011
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 011
- Report date:
- 2011
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- reaction mass of 1-vinylcyclohex-3-enecarbaldehyde and 4-vinylcyclohex-1-enecarbaldehyde
- EC Number:
- 700-805-3
- Molecular formula:
- C9H12O
- IUPAC Name:
- reaction mass of 1-vinylcyclohex-3-enecarbaldehyde and 4-vinylcyclohex-1-enecarbaldehyde
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, domestic (adaptation not specified)
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 20 mg/L
- Based on:
- DOC
Results and discussion
% Degradation
- Parameter:
- % degradation (O2 consumption)
- Value:
- 31
- Sampling time:
- 28 d
Applicant's summary and conclusion
- Validity criteria fulfilled:
- no
- Interpretation of results:
- other: not readily biodegradable
- Conclusions:
- The ready biodegradability of GR-50-0091 was determined by the manometric respirometry test. The test substance undergoes 31% biodegradation after 28d (32% after 34d) in the test conditions.
The curves obtained with the reference substance alone and with GR-50-0091 + reference substance show no toxic effect of GR-50-0091 to the microorganisms at the test concentration (20mg/L).
Thus GR-50-0091 should be regarded as not readily biodegradable according to this test.
Acompanying quantitative analysis for the test substance evidences rapid primary biodegradation of the test substance. Assuming that the primary biodegradation follows a first order kinetic DT50 and DT90 were calculated for 4-vinylcyclohex-1-enecarbaldehyde and 1-vinylcyclohex-3-enecarbaldehyde.
The results were:
DT50(4-vinylcyclohex-1-enecarbaldehyde )=3.5h
DT90(4-vinylcyclohex-1-enecarbaldehyde )=11.7h
DT50(1-vinylcyclohex-3-enecarbaldehyde)=7.4h
DT90(1-vinylcyclohex-3-enecarbaldehyde)=24.6h
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