Registration Dossier
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EC number: 470-270-6 | 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:
- 2007
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method C.4-C (Determination of the "Ready" Biodegradability - Carbon Dioxide Evolution Test)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Deviations:
- no
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic (adaptation not specified)
- Duration of test (contact time):
- ca. 28 d
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Reference substance:
- benzoic acid, sodium salt
- Key result
- Parameter:
- % degradation (inorg. C analysis)
- Value:
- >= 53.7 - <= 65.9
- Sampling time:
- 28 d
- Remarks on result:
- other: he substance was found to be biodegradable under the test condition within 28 days
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable, but failing 10-day window
- Conclusions:
- The CO2 formation of the substance in the test media significantly increased from the start of the test until test terminatino. On exposure Day 28 , avarage biodegradation had reached 60%. Consequently the substance was found to be biodegradable under the test condition within 28 days. However, the pass level for ready biodegrdability, i.e. a CO2 formation of at least 60% of the TOC in a 10-day window within the 28-day period of the test, was not reached.
Reference
Description of key information
The CO2 formation of the substance in the test media significantly increased from the start of the test until test terminatino. On exposure Day 28 , avarage biodegradation had reached 60%. Consequently the substance was found to be biodegradable under the test condition within 28 days. However, the pass level for ready biodegrdability, i.e. a CO2 formation of at least 60% of the TOC in a 10-day window within the 28-day period of the test, was not reached.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable but failing 10-day window
- Type of water:
- freshwater
Additional information
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