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:
- January 17 - May 5, 2022
- Reliability:
- 1 (reliable without restriction)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- Version / remarks:
- 1992
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge (adaptation not specified)
- Details on inoculum:
- Fresh samples of activated sludge are withdrawn on January 17th, 2022 from the sewage
treatment plant Ruhrverband Kläranlage, Sunthelle 6, 57392 Schmallenberg, Germany,
which is mainly fed with municipal wastewater.
The sample was 2 mm sieved after the arrival at the laboratory, washed once with tap water
and kept aerobic until use. The concentration of suspended solids was measured in the
sludge and found to be 2.6 g/L. The concentration used in the test was 29.6 mg dry
mass/litre (88.8 mg dry mass/3 L). - Duration of test (contact time):
- 60 d
- Initial conc.:
- 15 mg/L
- Based on:
- DOC
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Reference substance:
- benzoic acid, sodium salt
- Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 1.9
- St. dev.:
- 6.2
- Sampling time:
- 60 d
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- not readily biodegradable
- Conclusions:
- The test item must be considered as being not readily biodegradable.
- Executive summary:
The test item must be considered as being not readily biodegradable under the chosen test conditions according to OECD 301B.
Reference
Description of key information
The substance is not readily biodegradable.
Key value for chemical safety assessment
Additional information
The test item must be considered as being not readily biodegradable under the chosen test conditions according to OECD 301B.
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