Registration Dossier
Registration Dossier
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EC number: 227-133-9 | CAS number: 5675-51-4
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:
- 2019-01-09 to 2019-01-17
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-E (Determination of the "Ready" Biodegradability - Closed Bottle Test)
- Version / remarks:
- 2008
- GLP compliance:
- yes (incl. QA statement)
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- sewage, domestic (adaptation not specified)
- Details on inoculum:
- secondary effluent of a wastewater treatment plant treating predominantly domestic sewage (Wupper area water authority, WWTP Odenthal)
- Duration of test (contact time):
- 28 d
- Initial conc.:
- 5 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- other: ThOD
- Reference substance:
- benzoic acid, sodium salt
- Key result
- Parameter:
- other: % degradation (ThOD)
- Value:
- 47
- Sampling time:
- 28 d
- Results with reference substance:
- 83% Degradation after 14 days.
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- The biodegradation of the test item was 47 % ThOD after 28 Days. The test item failed the pass level reguested in the test method OECD 301 D which is a biodegradation ≥ 60 % ThOD. The test item is, therefore, considered to be not readily biodegradable.
. - Executive summary:
The biodegradation of the test item was 47 % ThOD after 28 Days. The test item failed the pass level reguested in the test method OECD 301 D which is a biodegradation ≥ 60 % ThOD. The test item is, therefore, considered to be not readily biodegradable.
The reference compound sodium benzoate showed 83 % degradation after 14 days.
Reference
Description of key information
Key value for chemical safety assessment
- Biodegradation in water:
- not biodegradable
- Type of water:
- other: domestic sewage
Additional information
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