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EC number: 939-412-9 | CAS number: 85586-38-5
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:
- OECD Guideline 301 B (Ready Biodegradability: CO2 Evolution Test)
- GLP compliance:
- yes (incl. QA statement)
- Specific details on test material used for the study:
- SOURCE OF TEST MATERIAL
- Batch no.: 0016420429
- Purity: ca. 76 %
- Impurities: 17.9 % triethanolamine, 2.5 % sulfates, 2.5% Mg, 1.6% water, 0.05 % cyclohexanol
STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material:
The stability of the test substance under storage conditions
over the test period was guaranteed by the sponsor, and the
sponsor holds this responsibility - Oxygen conditions:
- aerobic
- Inoculum or test system:
- activated sludge, domestic, non-adapted
- Details on inoculum:
- Source: Activated sludge from the wastewater treatment plant of Lambsheim, Germany
Concentration of dry substance: 30 mg/L - Duration of test (contact time):
- 28 d
- Initial conc.:
- 40 mg/L
- Based on:
- test mat.
- Initial conc.:
- 20 mg/L
- Based on:
- TOC
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Reference substance:
- aniline
- Preliminary study:
- Determination of total organic carbon by combustion
- Key result
- Parameter:
- % degradation (CO2 evolution)
- Value:
- 82
- Sampling time:
- 28 d
- Details on results:
- 10% biodegradation degree after ca. 1 day. Degree of biodegradation at the end of the ten-day window ca. 68%
- Results with reference substance:
- Degree of biodegradation after 14 days: 77%
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
Reference
Description of key information
Readily biodegradable (according to OECD criteria): 82% in 28 days, 68% within the 10-day window (OECD 301B)
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
- Type of water:
- freshwater
Additional information
In a CO2-Evolution test the biodegradation of the test item was investigated according to OECD guideline 301B (BASF 2019). After 28 days a biodegradation of 82% was observed. At the end of the ten day window the degree of biodegradation was ca. 68%. Therefore, the required pass level for ready biodegradability i.e., at least 60% of the theoretical CO2 production in a 10-day window exceeding 10% degradation within the 28-day period of the test was reached.
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