Registration Dossier
Registration Dossier
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EC number: 309-811-7 | CAS number: 101033-44-7
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:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- study well documented, meets generally accepted scientific principles, acceptable for assessment
- Qualifier:
- no guideline followed
- Principles of method if other than guideline:
- CO2 evolution test
- GLP compliance:
- not specified
- Oxygen conditions:
- aerobic
- Inoculum or test system:
- other: Mixed liquor activated sludge (secondary effluent)
- Duration of test (contact time):
- ca. 5 d
- Initial conc.:
- ca. 0.6 mg/L
- Based on:
- test mat.
- Initial conc.:
- ca. 5.7 mg/L
- Parameter followed for biodegradation estimation:
- CO2 evolution
- Key result
- Parameter:
- % degradation (test mat. analysis)
- Value:
- ca. 10 000
- Sampling time:
- 5 d
- Validity criteria fulfilled:
- yes
- Interpretation of results:
- readily biodegradable
- Conclusions:
- Rapidly biodegradable according to GHS.
Reference
Description of key information
Readily biodegradable of triethanolamine based on CO2 evolution method.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
Biodegradation test was conducted on the target substance following OECD guideline 301D Closed bottle method. The results indicated not readily biodegradable under the test conditions. However, it was not reported whether a toxicity control was conducted and how the initial concentration 3.g mg/l was determined. Further work may needed to investigate the biodegradability of the target substance.
As the target substance hydrolyzes rapidly, the intrinsic properties lies in the hydrolysis products. The triethanolamine degraded 100% after 5 days in a CO2 evolution method (West 1996).
The inorganic product, Zirconium dioxide, was not considered further in this report as biodegradation and partition coefficient assessments did not apply.
Based on these findings, the target substance was considered readily biodegradable.
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