Registration Dossier
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EC number: 201-487-4 | CAS number: 83-56-7
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
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-E (Determination of the "Ready" Biodegradability - Closed Bottle Test)
- Deviations:
- no
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 301 D (Ready Biodegradability: Closed Bottle Test)
- Deviations:
- no
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, predominantly domestic, non-adapted
- Details on inoculum:
- - Expiration of a biological laboratory activated sludge plant (Wupperverband)
- Use of prescribed volume of the inoculum - Duration of test (contact time):
- 28 d
- Initial conc.:
- 36.4 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- O2 consumption
- Reference substance:
- aniline
- Parameter:
- % degradation (O2 consumption)
- Value:
- 21
- Sampling time:
- 28 d
- Results with reference substance:
- Kinetic of reference substance (% degradation):
37 after 5 days
30 after 15 days
100 after 28 days - Validity criteria fulfilled:
- yes
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- Within 28 days, a degradation rate of 21 % was determined. The test item is considered to be "Not readily biodegradable". The reference compound aniline showed 100 % degradation after 28 days.
- Executive summary:
Within 28 days, a degradation rate of 21 % was determined. The test item is considered to be "Not readily biodegradable".
Reference
Description of key information
Not readily biodegradable
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
Biodegradation in water of the substance was evaluated by screen tests.
The test substance is considered as not readily biodegradable.
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