Registration Dossier
Registration Dossier
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EC number: - | 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:
- 04/2020 - 09/2020
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- 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, non-adapted
- Details on inoculum:
- Activated sludge from a biologic sewage treatment plant was used as inoculum. The chosen plant treats mostly domestic sewage.
The sludge was taken from the activation basin of the ESN (Stadtentsorgung Neustadt) sewage treatment plant, Im Altenschemel, 67435 NW-Lachen-Speyerdorf.
Date of collection: 05. Jun. 2020, batch no: E20200605. - Duration of test (contact time):
- 28 d
- Initial conc.:
- 66.7 mg/L
- Based on:
- test mat.
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Reference substance:
- aniline
- Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 0
- Sampling time:
- 28 d
- Details on results:
- The following data were determined for the test item Bayscript Black TP LXS 51134:
10-day-window: not detected degradation at the end of 10-day-window 0 % degradation at the end of the test 0 % pass level following guideline: 60 % at the end of 10-day-window for pure substances
respective 60 % at the end of the test for mixtures - Results with reference substance:
- Anilin as the positive controlle showed 83.53 % degradation after 28 days.
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- under test conditions no biodegradation observed
- Conclusions:
- For the test item Bayscript Black TP LXS 51134 no biodegradation was observed after 28 days.
- Executive summary:
For the test item Bayscript Black TP LXS 51134 no biodegradation was observed after 28 days. The 10-day window could not be determined. Because the test item is a mixture the 10-day-window does not have to be taken into account. The criterion of reaching 60% of degradation after 28 days is not met. Bayscript Black TP LXS 51134 is therefore considered as “not readily biodegradable, within 28 days”.
Reference
Description of key information
For the test item Bayscript Black TP LXS 51134 no biodegradation was observed after 28 days.
Key value for chemical safety assessment
- Biodegradation in water:
- not biodegradable
- Type of water:
- freshwater
Additional information
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