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Environmental fate & pathways

Adsorption / desorption

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Key value for chemical safety assessment

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N-[3-(trimethoxysilyl) propyl]butylamine hydrolyses in contact with water to the corresponding 3-(N-butylamino)propylsilanetriol, which have low log Kow values (<3) and thus have low potential for bioaccumulation. Therefore, in accordance with Column 2 of REACH Annex IX, the adsorption/desorption screening test does not need to be conducted for the silanol hydrolysis products.

For environmental exposure assessment, adsorption has been estimated for the silanol hydrolysis product based on log Kow using TGD (Technical Guidance Document) non-hydrophobics equation.The calculated log Kocis 0.37 (Kocof 2.38) (KOCWIN, EPISUITE 4.10).