Registration Dossier
Registration Dossier
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EC number: 701-212-2 | 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
- Study period:
- 30 November-28 December
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study without detailed documentation
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 992
- Report date:
- 2012
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- Version / remarks:
- 1992
- Qualifier:
- according to guideline
- Guideline:
- ISO DIS 9408 (Ultimate Aerobic Biodegradability - Method by Determining the Oxygen Demand in a Closed Respirometer)
- Version / remarks:
- 2000
- GLP compliance:
- not specified
Test material
- Reference substance name:
- Fatty acids, C16-18 (even numbered) and C18 (unsaturated) (9Z)-octadec-9-enyl esters.
- EC Number:
- 701-212-2
- Cas Number:
- 869110-10-1
- Molecular formula:
- R1, R2, R3: C15-, C17- saturated, C17- unsaturated alkyl chains
- IUPAC Name:
- Fatty acids, C16-18 (even numbered) and C18 (unsaturated) (9Z)-octadec-9-enyl esters.
1
- Specific details on test material used for the study:
- Lipex Shea WM, Batch number:1319975
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, non-adapted
- Details on inoculum:
- Activated sludge from Kävlinge WWTP, Sweden
- Duration of test (contact time):
- >= 0 - <= 28 d
Initial test substance concentration
- Initial conc.:
- ca. 0.046 g/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- other: % Biodegredation of ThOD
- Details on study design:
- Closed manometric respirometer (Modell 2173 B respectively BOD Direct, BSB system) made by Hach and Hach lange was used
Results and discussion
% Degradation
- Key result
- Parameter:
- other: COD
- Value:
- 92
- Sampling time:
- 28 d
- Details on results:
- The test item was degraded by approximately 73% within the 10-day window.
BOD5 / COD results
BOD5 / COD
- Key result
- Parameter:
- COD
- Value:
- 92 other: %
- Results with reference substance:
- Not included/Not specified in the test report
Any other information on results incl. tables
Deviation:
According to the Guideline the test temperature should not vary by more than ±1°C, The test temperature varied within ±1.3°C in this experiment
The test substance was not soluble in water, and was thus mixed with water to form an emulsion in order to measure COD.
The test substance was 100 % degraded, which is not possible as some carbon from the test material was incorporated into new cells. This high percentage can be cause by uncertainties in the measurements or the use of COD instead of ThOD.
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- The test article "Lipex Shea WM" can be regarded as readily biodegradable, subject to the COD measurement.
- Executive summary:
The test article "Lipex Shea WM" can be regarded as readily biodegradable, subject to the COD measurement.
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