Registration Dossier
Registration Dossier
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EC number: 204-634-0 | CAS number: 123-54-6
Biodegradation in water: screening tests
Administrative data
- 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:
- other: Data from reliable source. Though no detailed test report is available, all tests from the Japanese Authorities are performed according to an OECD guideline.
Data source
Reference
- Reference Type:
- publication
- Title:
- Unnamed
- Year:
- 2 002
- Report date:
- 1991
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
- Deviations:
- no
- GLP compliance:
- not specified
Test material
- Details on test material:
- no data
Constituent 1
- Specific details on test material used for the study:
- Details on properties of test surrogate or analogue material (migrated information):
no data
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Details on inoculum:
- Sludge concentration: 30 mg/l
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 100 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Details on study design:
- no data
Reference substance
- Reference substance:
- not specified
Results and discussion
- Preliminary study:
- not reported
- Test performance:
- not reported, according to guideline
% Degradation
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 83
- Sampling time:
- 28 d
- Details on results:
- Indirect Analysis: BOD 83%
Direct Analysis: GC 100% ; TOC 95%
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- Substance is readily biodegradable under the conditions used.
- Executive summary:
A readily biodegradability test was performed with 2,4 -Pentanedione according to OECD 301C, Ready Biodegradability: Modified MITI Test (I). The concentration of the substance was 100 mg/l whereas the activated sludge concentration was 30 mg/l. The test showed that the substance is considered as readily biodegradable of more than 80% biodegradation after 28 days of exposure.
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