Registration Dossier
Registration Dossier
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EC number: 230-363-2 | CAS number: 7069-42-3
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:
- other: Guideline study conducted in accordance with GLP.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 005
- Report date:
- 2005
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- GLP compliance:
- yes
Test material
- Reference substance name:
- Retinyl propionate
- EC Number:
- 230-363-2
- EC Name:
- Retinyl propionate
- Cas Number:
- 7069-42-3
- Molecular formula:
- C23H34O2
- IUPAC Name:
- retinyl propionate
- Details on test material:
- - Vitamin A-propionat, 2,5 Mio, unstabilisiert (retinol propionat)
- Purity: 95.9 w - %
- Batch No.: 00000777L0 PBG-Nr.10540158
- Water solubility: < 10 ug/l
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic (adaptation not specified)
- Details on inoculum:
- - Source of inoculum/activated sludge: Municipal activated sludge from the wastewater treatment plant, stored in laboratory wastewater treatment plant, which was fed with municipal sewage.
- Pretreatment: The sludge was washed and aerated for 48 hours and then added to the test vessels to obtain a sludge concentration of 30 mg/L dry substance.
Initial test substance concentrationopen allclose all
- Initial conc.:
- 25 mg/L
- Based on:
- test mat.
- Initial conc.:
- 20 mg/L
- Based on:
- other: TOC
Reference substance
- Reference substance:
- aniline
- Remarks:
- (20 mg/L TOC)
Results and discussion
% Degradation
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 40 - 50
- Sampling time:
- 28 d
- Details on results:
- - The test substance is in this test partly or moderately biodegradable.
- Kinetic of test substance (in %):
= 1 after 3 days
= 10 after 7 days
= 27 after 14 days
= 36 after 21 days
= 45 after 28 days
BOD5 / COD results
- Results with reference substance:
- Kinetic of control substance (in %):
= 70 after 10 days
= 88 after 28 days
Applicant's summary and conclusion
- Interpretation of results:
- other: not readily biodegradable according to OECD criteria
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