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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Justification:Column 2 criteria of Annex VII for ready degradability testing of trichlorosilane provide the following adaptations to required testing data:

The study does not need to be conducted if the substance is inorganic.


Trichlorosilane is an inorganic liquid substance which hydrolizes immediately and completely upon contact with water. For that reason, no experimental testing for this property could be performed with trichlorosilane.


Therefore, biodegradation is not considered to be important environmental fate process for trichlorosilane.