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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

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. QSAR prediction readily biodegradable

3,6,9,12,15 -pentaoxahexadecanol (PentaEGME): no experimental data available. QSAR predicts readily biodegradable.

The QSAR models suggests a slight tendency to slower degradation with increasing molecular weight within the homologous series.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable but failing 10-day window
Type of water:
freshwater

Additional information

No biodegradation data is available on the substance itself. Experimental data is available on one major components however and a closely related member of the homologous series. 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. A QSAR suggests that both of these substances and PentaEGME are readily biodegradable, but that there is a slight trend towards slower degradation with increasing molecular weight. A conservative conclusion therefore, based on the experimental data available and the trends seen with the QSAR, is that the multi-constituent substance is readily biodegradable but may not meet the 10 day window.