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Environmental fate & pathways

Biodegradation in water: screening tests

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Description of key information

Key study: Based on read-across approach from experimental data on analogue Methyltriacetoxysilane (OECD 301F, GLP study), Propyltriacetoxysilane is determined to be readily biodegradable.

Key value for chemical safety assessment

Biodegradation in water:
readily biodegradable

Additional information

Key study: Read-across from analogue substance Methyltriacetoxysilane:

In the readily biodegradability study conducted on analogue Methyltriacetoxysilane according to OECD 301F (GLP study), 79.5% of biodegradation was obtained after 28 days of incubation with activated sludge inoculum in aerobic conditions. Based on these results, the read-across was applied and Propyltriacetoxysilane is determined to be readily biodegradable under aerobic aqueous conditions.

Supporting studies: Read-across from hydrolysis product acetic acid.

In the readily biodegradation study performed by the Institute of Technology and Evolution (1993) according to OECD 301C (Japanese MITI test) on supporting substance acetic acid, which reached the 74% of its theoretical BOD in 2 weeks, the read-across approach was applied and the substance Propyltriacetoxysilane was considered to be readily biodegradable under test conditions.

In the study by Zahn and Wellen, 1980, performed with a method similar to OECD 302B, acetic acid was found to degrade > 90% after 3 days. Based on this experimental result on the supporting substance acetic acid, the read-across approach was applied and Propyltriacetoxysilane was considered to be biodegradable under test conditions.

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