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Diss Factsheets

Environmental fate & pathways

Adsorption / desorption

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Administrative data

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Description of key information

Adsorption to solid soil phase is expected. 

Key value for chemical safety assessment

Additional information

A study on the adsorption behavior of the test substance is not available. As soil sorption of organic non-ionic substances can often be estimated from their octanol-water partition coefficient, it could be concluded that based on the logPow > 4 the test substance is expected to adsorb to the solid soil phase.

Crucial factors in determination of the adsorptive potential of a substance are Van-der-Waals hydrophobic interactions, hydrogen bonding, charge transfer interactions, ligand exchange and ion bonding, direct and induced ion-dipole and dipole-dipole interactions and covalent binding between molecules which are responsible for attraction or repulsion of the respective molecules (see EU TGD Part III, 2003). The Van-der-Waals forces and other aspects mentioned above however are probably rather negligible in this case because of the size and bulkiness of the molecule and its expected small contact areas with which it could adsorb to particle surfaces. This theory however cannot be supported with reliable literature data so far, and thus, the adsorption potential of the substance will be assessed based on its logPow which indicates that adsorption to the solid soil phase is possible.