Registration Dossier

Environmental fate & pathways

Adsorption / desorption

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Description of key information

Adsorption coefficient (log Koc) of the two major constituents is in the range 0.7 to 4.6.

The registered substance is considered as immobile, based on the worst-case Koc value.

=> The registered substance is considered as immobile.

Key value for chemical safety assessment

Koc at 20 °C:
40 550.85

Additional information

Considering the registered substance is a multi-constituent, the major one having very low solubility in water, experimental testing was not considered suitable or feasible. Therefore, a constituent-based approach was prefered. Koc values were determined for each constituent by using the calculations QSAR from the TGD part III (2003):

For the major constituent, the predicted QSAR value is log Koc = 4.6.

For the second constituent, the predicted QSAR value is log Koc = 0.7.

The registered substance is considered as immobile according to McCall et al. (1980), based on the worst-case Koc value.

[LogKoc: 4.61]