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EC number: 212-477-4 | CAS number: 821-41-0
Biodegradation in water: screening tests
Administrative data
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 30.10.2002 to 10.01.2003
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 003
- Report date:
- 2003
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 A (Ready Biodegradability: DOC Die Away Test)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-A (Determination of the "Ready" Biodegradability - Dissolved Organic Carbon (DOC) Die-Away Test)
- Version / remarks:
- Cited as Directive 92/69/EEC, C.4-A
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
Test material
- Reference substance name:
- Hex-5-en-1-ol
- EC Number:
- 212-477-4
- EC Name:
- Hex-5-en-1-ol
- Cas Number:
- 821-41-0
- Molecular formula:
- C6H12O
- IUPAC Name:
- hex-5-en-1-ol
- Details on test material:
- IUCLID4 Test substance: as prescribed by 1.1 - 1.4
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic (adaptation not specified)
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 16.7 mg/L
- Based on:
- DOC
Reference substance
- Reference substance:
- benzoic acid, sodium salt
Results and discussion
% Degradation
- Key result
- Parameter:
- % degradation (DOC removal)
- Value:
- 100
- Sampling time:
- 28 d
- Details on results:
- Kinetic of test substance (in %):
= 99 after 7 day(s)
= 99 after 14 day(s)
= 99 after 21 day(s)
= 99 after 27 day(s)
= 100 after 28 day(s)
Kinetic of control substance (in %):
= 99 after 14 day(s)
= 98 after 28 day(s)
Degradation products: not measured
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- 5-Hexen-1-ol reached a degree of degradation of 100 % (DOC decrease) in the course of 28 days.
Since 5-Hexen-1-ol is degraded by > 70% within 10 days after the time at which the biodegradation has reached 10 %, it is considered to be " readily biodegradable ".
The reference item Sodium benzoate achieved a degree of degradation of > 70 % in the course of 14 days (here: 100 % after 7 days).
Moreover, the difference of extremes of replicate values of the removal of the test item at the plateau, at the end of the 10-d window and at the end of the test was less than 20 %.
Therefore, the test can be regarded as valid.
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