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EC number: 211-951-8 | CAS number: 719-80-2
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: GLP compliant guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 996
- Report date:
- 1997
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:
- Ethyl diphenylphosphinite
- EC Number:
- 211-951-8
- EC Name:
- Ethyl diphenylphosphinite
- Cas Number:
- 719-80-2
- Molecular formula:
- C14H15OP
- IUPAC Name:
- ethyl diphenylphosphinite
- Details on test material:
- - Name of test substance (as cited in study report): Ethoxidiphenylphosphin dest.
- Molecular weight: 230 g/mol
- Purity: 95.6 %
- Parameters of test substance: TOC: 730 mg/g, ThOC: 730 mg/g, ThCO2: 2679 mg/g
Constituent 1
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, non-adapted
- Details on inoculum:
- - Inoculum: activated domestic and industrial sludge from laboratory sewage-treatment plant
- The concentration of dry substance was 30 mg/l - Duration of test (contact time):
- 29 d
Initial test substance concentration
- Initial conc.:
- 28 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- CO2 evolution
Reference substance
- Reference substance:
- aniline
Results and discussion
% Degradation
- Parameter:
- % degradation (CO2 evolution)
- Value:
- > 20 - < 30
- Sampling time:
- 28 d
- Details on results:
- - Duration of adaptation phase: 4 days
- Duration of degradation phase: 24 days
Kinetic of test substance (in %):
ca. 12 after 5 day(s)
ca. 14 after 7 day(s)
ca. 18 after 14 day(s)
ca. 20 after 21 day(s)
ca. 22 after 28 day(s)
- Degradation in the inhibition control (CO2/ThCO2): 40-50 % after 14 days
BOD5 / COD results
- Results with reference substance:
- - Degradation of reference substance (% CO2/ThCO2): 80 - 90 after 14 days
- Kinetic of control substance (in %):
ca. 80 ... 90 after 14 day(s)
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- other: Not readily biodegradable (according to OECD criteria)
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