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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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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Link to relevant study record(s)

adsorption / desorption: screening
Data waiving:
other justification
Justification for data waiving:

Description of key information

Low potential for adsorption.

For environmental exposure assessment, adsorption is predicted using the TGD (Technical Guidance Document) ‘non-hydrophobics’ log Kow prediction method (European Commission, 2003).

Log Koc = 1.48 (Koc of 30.8) for the silanol hydrolysis product.

Key value for chemical safety assessment

Koc at 20 °C:

Additional information

Trimethoxy(2,4,4-trimethylpentyl)silane hydrolyses rapidly in contact with water to the corresponding silanol hydrolysis product (2,4,4-trimethylpentyl)silanetriol and methanol, which both have low log Kow values (< 3), and thus have low potential for adsorption. Therefore, in accordance with Column 2 of REACH Annex VIII, the adsorption/desorption screening test does not need to be conducted, and there is no need for further information on adsorption/desorption.