Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

The registered substance will hydrolyse rapidly in contact with water. The interim hydrolysis products are progressively shorter alpha-omega siloxanediols and the ultimate hydrolysis product relevant to the CSA is methylsilanetriol. Over the long-term, further degradation in the environment, e.g. to silicate, is thought on grounds of chemical properties, to be possible.

Biodegradation in water studies with structural analogues and soil biodegradation studies with dimethylsilanediol demonstrate that no significant biodegradation of the hydrolysis products will take place.