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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Biodegradation in water: screening tests

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Administrative data

Link to relevant study record(s)

biodegradation in water: ready biodegradability
Data waiving:
study scientifically not necessary / other information available
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Description of key information

The submission substance hydrolyses very rapidly (half-lives of =0.2 minutes at pH 4 and pH 9, =0.3 minutes at pH 7 and 2°C) and within the timescale of a ready biodegradation study to methanol and (poly)silicic acid with silanetriol as an intermediate hydrolysis product.

Methanol is readily biodegradable (OECD 2004).

Silanetriol and (poly)silicic acid are inorganic, therefore in accordance with Column 2 of REACH Annex VII, there is no need to conduct the ready biodegradation study.

Key value for chemical safety assessment

Additional information