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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Adsorption / desorption

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Administrative data

Link to relevant study record(s)

Description of key information

Key value for chemical safety assessment

Additional information

Justification:Column 2 criteria of Annex VIII for adsorption/desorption screening testing of trichlorosilane provide the following adaptations to required testing data:

The study need not be conducted if

·                   based on the physico-chemical properties the substance can be expected to have a low potential for adsorption (e.g. the substance has a low octanol/water partition coefficient), or

·                   the substance and its degradation products decompose rapidly.


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.


Overall, adsorption/desorption is not considered to be important environmental fate process for trichlorosilane.