Registration Dossier
Registration Dossier
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EC number: 245-883-5 | CAS number: 23783-42-8
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Experimental data:
2-(2-(2-methoxyethoxy)ethoxy)ethanol: readily biodegradable and meets 10 day window
3, 6, 9, 12-tetraoxotridecanol: readily biodegradable but does not meet 10 day window
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable but failing 10-day window
- Type of water:
- freshwater
Additional information
In a guideline study, the substance 2-(2-(2-methoxyethoxy)ethoxy)ethanol was found to be readily biodegradable and met the 10 day window. Full degradation occured within 13 days. In a guideline study, the substance 3, 6, 9, 12-tetraoxotridecanol was found to be readily biodegradable but did not meet the 10 day window. An analysis using the BIOWIN QSAR predicts that both of these substances are readily biodegradable. However, an analysis of the fragment descriptions suggests on a semi-quantitative basis that that breakdown may be slower with increasing molecular size. The QSAR is therefore supportive of the experimental data. A conservative conclusion that would cover all potential compositions is therefore that the UVCB substance is readily biodegradable but does not meet the 10 day window.
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