Registration Dossier
Registration Dossier
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EC number: 201-484-8 | CAS number: 83-53-4
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:
- 2 018
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- 1,4-dibromonaphthalene
- EC Number:
- 201-484-8
- EC Name:
- 1,4-dibromonaphthalene
- Cas Number:
- 83-53-4
- Molecular formula:
- C10H6Br2
- IUPAC Name:
- 1,4-dibromonaphthalene
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic (adaptation not specified)
- Details on inoculum:
- Activated sludge was collected from the exit of the aeration tank, or near the exit from the tank, of a well-operated wastewater treatment plant receiving predominantly domestic sewage.
The sludge was settled and the liquid supernatant discarded. The concentrated sludge was then suspended in the mineral solution. These two steps were repeated twice. - Duration of test (contact time):
- ca. 28 d
Initial test substance concentration
- Initial conc.:
- ca. 100 mg/L
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
Reference substance
- Reference substance:
- benzoic acid, sodium salt
Results and discussion
% Degradation
- Key result
- Parameter:
- % degradation (O2 consumption)
- Value:
- ca. 0
- Sampling time:
- 28 d
BOD5 / COD results
- Results with reference substance:
- Based on a biodegradation rate higher than 60% in 14 days in the reference control, the test was carried out under good conditions.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- The test substance is not readily biodegradable as its percentage of biodegradation was 0% at 28 days.
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