Registration Dossier
Registration Dossier
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EC number: 414-420-0 | CAS number: - SPE 93279
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:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- other: Annex V, C6 (closed bottle test)
- GLP compliance:
- yes
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- - Source of inoculum/activated sludge (e.g. location, sampling depth, contamination history, procedure): aeration stage of the HRC Limited sewage treatment plant treating predominantly domestic sewage
- Preparation of inoculum for exposure: The sample was allowed to settle and the supernatant was filtered through a Whatman GFA filter (paper) first 250 ml discarded). Test media was inoculated with 1 drop of inoculum / liter. - Reference substance:
- benzoic acid, sodium salt
- Parameter:
- % degradation (O2 consumption)
- Value:
- 90
- Sampling time:
- 28 d
- Details on results:
- Points of degradation plot (test substance):
54% degradation after 5d
83% degradation after 15d
90% degradation after 28d - Results with reference substance:
- Points of degradation plot (reference substance):
81% degradation after 5d
84% degradation after 15d
100% degradation after 28d - Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
Reference
Description of key information
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
- Type of water:
- freshwater
Additional information
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