Registration Dossier
Registration Dossier
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EC number: 224-320-7 | CAS number: 4306-88-1
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: inherent biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 11.5.95 - 8.6.95
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: non-GLP
- Remarks:
- non-GLP
- Justification for type of information:
- The study is suitable to fullfill data requests.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 995
- Report date:
- 1995
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 302 C (Inherent Biodegradability: Modified MITI Test (II))
- Version / remarks:
- 1981
- GLP compliance:
- no
Test material
- Reference substance name:
- 2,6-di-tert-butyl-4-nonylphenol
- EC Number:
- 224-320-7
- EC Name:
- 2,6-di-tert-butyl-4-nonylphenol
- Cas Number:
- 4306-88-1
- Molecular formula:
- C23H40O
- IUPAC Name:
- 2,6-di-tert-butyl-4-nonylphenol
- Details on test material:
- Isonox 232 (Phenol, 2,6-bis (1,1-dimethylethyl)-4-nonyl)
Clear colorless liquid
Storage: In original container at room temperature
Batch number not provided in report
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, non-adapted
- Details on inoculum:
- 100 mg dry mass/L non-adapted microorganisms from 10 different sewage treatment plants throughout England. The mixed sludge was fed daily with a 0.1% synthetic sewage and maintained on constant aeration at 25±2°C until use.
- Duration of test (contact time):
- 28 d
Initial test substance concentrationopen allclose all
- Initial conc.:
- 30 mg/L
- Based on:
- test mat.
- Initial conc.:
- 3.13 mg/L
- Based on:
- ThOD
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
Reference substance
- Reference substance:
- aniline
Results and discussion
- Test performance:
- The test was conducted in the dark. The results of the reference substance show the suitability of inoculum and culture conditions.
% Degradation
- Key result
- Parameter:
- % degradation (O2 consumption)
- Value:
- 31
- Sampling time:
- 28 d
Applicant's summary and conclusion
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
