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EC number: 943-498-3 | 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: Guideline study under GLP. Only poor documentation available.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Report date:
- 1992
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- GLP compliance:
- yes
Test material
- Reference substance name:
- Reaction mass of Methyl N-octadecylterephthalamate and N,N'-Dioctadecylterephthalamide
- IUPAC Name:
- Reaction mass of Methyl N-octadecylterephthalamate and N,N'-Dioctadecylterephthalamide
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge: non-adapted sludge from domestic STP Frankfurt-Sindlingen
- Pretreatment: 5d aeration in nutrient salt solution
- Concentration of sludge: 13 mg/l - Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- ca. 152 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
Reference substance
- Reference substance:
- other: not specified
Results and discussion
% Degradationopen allclose all
- Parameter:
- % degradation (O2 consumption)
- Value:
- ca. 2
- Sampling time:
- 7 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- ca. 4
- Sampling time:
- 14 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- ca. 5
- Sampling time:
- 21 d
- Parameter:
- % degradation (O2 consumption)
- Value:
- ca. 0
- Sampling time:
- 28 d
BOD5 / COD results
- Results with reference substance:
- The O2 consumption of the reference substance reached >60% within 10d.
Applicant's summary and conclusion
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- The substance is not ready biodegradable under the test conditions.
- Executive summary:
The ready biodegradability of the test item was determined in an OECD301F Test with a non-adapted activated sludge over a period of 28 days. The test item was tested at a concentration of 152 mg/L. The biodegradation of the test item was followed by determination of O2 consumption.
In order to check the activity of the test system a reference substance was tested. After 10 days a biodegradation rate of >60% % was reached.
The biodegradation remained in the range of 0 -5 % and the level of 60 % was not reached within the test duration of 28 days.
According to the criteria of the OECD 301F guideline the test item is not readily biodegradable within 28 days.
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