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EC number: 253-391-7 | CAS number: 37203-76-2
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:
- 2006-06-29
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
Data source
Reference
- Reference Type:
- other company data
- Title:
- Unnamed
- Year:
- 2 006
- Report date:
- 2006
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 301 F (Ready Biodegradability: Manometric Respirometry Test)
- Deviations:
- not specified
- GLP compliance:
- no
Test material
- Reference substance name:
- Ethyl dihydrogen phosphate
- EC Number:
- 216-603-9
- EC Name:
- Ethyl dihydrogen phosphate
- Cas Number:
- 1623-14-9
- Molecular formula:
- C2H7O4P
- IUPAC Name:
- Phosphoric acid,monoethyl ester
- Test material form:
- liquid
Constituent 1
- Specific details on test material used for the study:
- Chem. name: Ethylphosphorsäureester
CAS-no.: 37203-76-2
Study design
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- Feeding water of sewage treatment plant Schönaich
- Duration of test (contact time):
- 28 d
Initial test substance concentration
- Initial conc.:
- 541 mg/L
- Based on:
- test mat.
Parameter followed for biodegradation estimation
- Parameter followed for biodegradation estimation:
- O2 consumption
- Details on study design:
- pH: 2.3
pH adjusted with NaOH at 7.3
Results and discussion
% Degradation
- Key result
- Parameter:
- % degradation (O2 consumption)
- Value:
- 44
- Sampling time:
- 28 d
BOD5 / COD results
BOD5 / COD
- Key result
- Parameter:
- BOD5
- Value:
- 120 mg O2/g test mat.
Any other information on results incl. tables
BSB5 |
BSB10 |
BSB28 |
120 mg O2/g |
390 mg O2/g |
660 mg O2/g |
Applicant's summary and conclusion
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- Phosphoric acid, ethylester was tested for ready biodegradation in a screening test similar to OECD Guideline 301F. After 28 days 44% degradation was observed by detremination of the biological oxygen demand (BOD). Therefore it can be concluded that Phosphoric acid, ethylester is not readily biodegradable.
- Executive summary:
Phosphoric acid, ethylester was tested for ready biodegradation in a screening test similar to OECD Guideline 301F. After 28 days 44% degradation was observed by detremination of the biological oxygen demand (BOD). Therefore it can be concluded that Phosphoric acid, ethylester is not readily biodegradable.
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