Registration Dossier
Registration Dossier
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EC number: 605-694-4 | CAS number: 173832-46-7
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Log Koc > 5 (based on Molecular Connectivity Index (MCI); KOCWIN v2.00)
Key value for chemical safety assessment
Additional information
No studies investigating the adsorption/desorption behaviour of Fatty acids, C18 unsaturated, trimers, 2-ethylhexyl esters (CAS No. 173832-46-7) are available. Using the KOCWIN Program (v2.00), log Koc values in the range of 13.98 to 19.47 were calculated for its main components based on the molecular connectivity index (MCI; Hopp, 2011a). This model has no universally accepted definition of its model domain, but since the substance is outside the log Kow range of the training set, the results should be taken with caution. The definite values for the main components may not be fully reliable, but indicate a high adsorption potential of the UVCB substance, which is also to be expected based on the high calculated log Kow values of the main components (log Kow > 10, KOWWIN v1.68) and the low water solubility of the UVCB substance (< 1 mg/L).
Additionally, the log Koc was calculated for the substance 2-Ethylhexyl laurate (CAS No. 20292-08-4; Ozolins, 2011), which has the same structure as the target substance, except for the shorter fatty acid chains. The substance fit in the domain of the training set of the MCI method, and the resulting log Koc value 4.90 (based on MCI) is reliable. The adsorption potential for Fatty acids, C18 unsaturated, trimers, 2-ethylhexyl esters is expected to be higher, due to the length of the fatty acid chain. Based on this information, the adsorption potential of the target substance is assumed to be high.
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