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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 behaviour of HD4 is dominated by hydrolysis (and condensation) reactions. On the basis of available data, the presumed ultimate hydrolysis product methylsilanetriol has very low volatility, low adsorption potential and is not expected to biodegrade. Therefore, any substance released to the environment is, under steady state conditions, expected to hydrolyse rapidly. At low concentrations, methylsilanetriol is expected to form and this is expected to be found in the aquatic compartment; it will degrade slowly via abiotic pathways.