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Environmental fate & pathways

Adsorption / desorption

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Reference
Endpoint:
adsorption / desorption: screening
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:

Description of key information

Adsorption/desorption: 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

Additional information

Trimethoxy(2,4,4-trimethylpentyl)silane hydrolyses in contact with water to the corresponding (2,4,4-trimethylpentyl)silanetriol, which 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 also there is no need for further information on adsorption/desorption.