Registration Dossier
Registration Dossier
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EC number: 202-425-9 | CAS number: 95-50-1
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods with acceptable restrictions
- Remarks:
- National guideline study
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
- Deviations:
- not specified
- GLP compliance:
- not specified
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Duration of test (contact time):
- 28 d
- Initial conc.:
- 100 mg/L
- Parameter:
- other: Biochemical oxygen demand
- Value:
- 0
- Sampling time:
- 28 d
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- A test on biodegradation following OECD Guideline 301C with activated sludge exposed to 100 mg o-dichlorobenzene/L under aerobic conditions for 28 days showed that o-dichlorobenzene is not readily biodegradable.
- Executive summary:
A test on biodegradation following OECD Guideline 301C with activated sludge exposed to 100 mg o-dichlorobenzene/L under aerobic conditions for 28 days showed that o-dichlorobenzene is not readily biodegradable (MITI, 1992)
Reference
Description of key information
A test on biodegradation following OECD Guideline 301C with activated sludge
exposed to 100 mg 1,2-dichlorobenzene/L under aerobic conditions for 28 days showed that 1,2-dichlorobenzene is not readily biodegradable (MITI, 1992).
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
A test on biodegradation following OECD Guideline 301C with activated sludge exposed to 100 mg 1,2-dichlorobenzene/L under aerobic conditions for 28 days showed that 1,2-dichlorobenzene is not readily biodegradable (MITI, 1992).
However, aerobic biodegradation by adapted microorganisms is possible in the aquatic environment. Biodegradation under anaerobic conditions could not be proved unambiguously.
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