Registration Dossier
Registration Dossier
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EC number: 931-242-3 | CAS number: -
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: see 'Remark'
- Remarks:
- Guideline study according to OECD, however industrial activated sludge was used and no data on substance purity are given. The test substance was Vitamin A Acetate, which covers the majority of the components of the Reaction mass of isomers of [2,5,7,8-Tetramethyl-2-4,8,12-trimethyltridecyl]chroman-6-yl] acetate
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 988
- Report date:
- 1988
Materials and methods
- Principles of method if other than guideline:
- Test procedures according to EU Directive 79/831/EEC Annex V, part C: Methods fore the Determination of the ecotoxicity degradation - biodegradation, Manometric respirometry test. This method is comparable to the OECD guideline 301 F.
- GLP compliance:
- no
Test material
- Reference substance name:
- Retinyl acetate
- EC Number:
- 204-844-2
- EC Name:
- Retinyl acetate
- Cas Number:
- 127-47-9
- Molecular formula:
- C22H32O2
- IUPAC Name:
- [(2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohexen-1-yl)nona-2,4,6,8-tetraenyl] acetate
- Details on test material:
- - Name of test material (as cited in study report): Vitamin-A-Acetate
No further data on the characteristics of the test substance given.
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, industrial (adaptation not specified)
Initial test substance concentration
- Initial conc.:
- 30 mg/L
- Based on:
- test mat.
Reference substance
- Reference substance:
- aniline
Results and discussion
% Degradation
- Parameter:
- % degradation (O2 consumption)
- Value:
- 30 - 40
- Sampling time:
- 28 d
- Details on results:
- Kinetic of test substance (in %):
< 1 after 1 day(s)
= 1 ... 12 after 5 day(s)
= 16 ... 39 after 10 day(s)
= 22 ... 36 after 20 day(s)
= 22 ... 41 after 28 day(s)
Kinetic of control substance (in %):
< 1 after 4 day(s)
= 52.2 after 7 day(s)
Applicant's summary and conclusion
- Interpretation of results:
- other: not readily biodegradable
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