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EC number: 909-044-3 | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- other information
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Guideline study, Basic data given.
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 C (Ready Biodegradability: Modified MITI Test (I))
- Deviations:
- not specified
- GLP compliance:
- not specified
- Inoculum or test system:
- mixture of sewage, soil and natural water
- Details on inoculum:
- - Concentration of sludge: 30 mg/L
- Duration of test (contact time):
- 4 wk
- Initial conc.:
- 100 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- O2 consumption
- Parameter followed for biodegradation estimation:
- TOC removal
- Parameter followed for biodegradation estimation:
- test mat. analysis
- Details on study design:
- test equipment: standard type
- Parameter:
- % degradation (O2 consumption)
- Value:
- 48
- Sampling time:
- 4 wk
- Remarks on result:
- other: reported as BOD
- Parameter:
- % degradation (TOC removal)
- Value:
- 50
- Sampling time:
- 4 wk
- Parameter:
- % degradation (test mat. analysis)
- Value:
- 86
- Sampling time:
- 4 wk
- Remarks on result:
- other: method: GC
- Details on results:
- The test substance partially remained unchanged in the test solution, while the rest changed form to methanol, phosphonic acid, and monomethyl phosphonate.
- Interpretation of results:
- other: not ready biodegradable
- Endpoint:
- biodegradation in water: ready biodegradability
- Type of information:
- experimental study
- Adequacy of study:
- other information
- Study period:
- 1992
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: GLP - Guideline study, basic data given
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-B (Determination of the "Ready" Biodegradability - Modified OECD Screening Test)
- Version / remarks:
- , Directive 79/831/EEC, Annex V
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic (adaptation not specified)
- Details on inoculum:
- - Source of inoculum/ activated sludge: sewage of a laboratory treatment plant which operates with municiple waste water
- Concentration of sludge: 0.5 ml/900 ml
- no pre-treatment
- sampling: 18.02.1992 - Duration of test (contact time):
- 28 d
- Initial conc.:
- 20 mg/L
- Based on:
- DOC
- Parameter followed for biodegradation estimation:
- DOC removal
- Details on study design:
- TEST CONDITIONS
- Test temperature: 20-24°C
- Continuous darkness: yes
SAMPLING
- Sampling frequency: samples were taken at the start of the test (0 h) and following on day 7, 14, 21, 27 and 28
CONTROL AND BLANK SYSTEM
- Inoculum blank: yes - Reference substance:
- aniline
- Parameter:
- % degradation (DOC removal)
- Value:
- 0
- Sampling time:
- 0 h
- Parameter:
- % degradation (DOC removal)
- Value:
- 44
- Sampling time:
- 7 d
- Parameter:
- % degradation (DOC removal)
- Value:
- 50
- Sampling time:
- 14 d
- Parameter:
- % degradation (DOC removal)
- Value:
- 50
- Sampling time:
- 21 d
- Parameter:
- % degradation (DOC removal)
- Value:
- 50
- Sampling time:
- 28 d
- Results with reference substance:
- aniline: 100 % degradation after 28 days
- Interpretation of results:
- other: not readily biodegradable
Referenceopen allclose all
Description of key information
Dimethyl phophonate (DMP,) one of the main components of phosphitester residues, shows some degradation but is not considered as ready biodegradable. As worst case approach, also phosphitester residue is considered as not readiyl biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
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