Registration Dossier
Registration Dossier
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EC number: 429-080-9 | 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:
- key study
- Study period:
- 10th Nov - 9th Dec 1998
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods
- Qualifier:
- according to guideline
- Guideline:
- other: : Method C4c, Measurement of CO2 evolution Dosing took place at a level of 10 mg/l carbon (14.7 mg/l of the test substance)
- GLP compliance:
- yes
- Specific details on test material used for the study:
- Identity of test material same as for substance defined in section 1
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Duration of test (contact time):
- 28 d
- Initial conc.:
- 10 mg/L
- Based on:
- COD
- Reference substance:
- benzoic acid, sodium salt
- Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 4
- Sampling time:
- 3 d
- Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 7
- Sampling time:
- 8 d
- Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 18
- Sampling time:
- 16 d
- Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 18
- Sampling time:
- 24 d
- Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 26
- Sampling time:
- 28 d
- Results with reference substance:
- Points of degradation plot (reference substance):
45 % degradation after 3 d
68 % degradation after 8 d
81 % degradation after 16 d
82 % degradation after 24 d
85 % degradation after 28 d - Validity criteria fulfilled:
- yes
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- The test material attained 26% degradation after 28 days and therefore cannot be considered to be readily biodegradable under the strict terms and conditions of OECD guideline No 301B
Reference
Description of key information
The test material attained 26% degradation after 28 days and therefore cannot be considered to be readily biodegradable under the strict terms and conditions of OECD guideline No 301B
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
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