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Environmental fate & pathways

Adsorption / desorption

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Description of key information

Adsorption to solid soil phase is expected.

Key value for chemical safety assessment

Koc at 20 °C:
1 386

Additional information

Russel et al. (1986) investigated the adsorption/desorption potential of different phthalate esters in soil. In this non-guideline study they used natural soil from Broome Count, NY with an organic carbon content of 1.59 %. By use of HPLC-GC, a Koc of 1386 and a logKoc of 3.14 werde measured indicating the potential for bindign to solid soil phase and/or organic carbon. Furthermore, the behaviour of DBP in the adsorption/desorption test supports the theory of a two-step adsorption and/or desorption mechanism involving a fast diffusion to the surface of the bound organic carbon on the soil and a slower diffusion into (or out of) this organic gel matrix.