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Environmental fate & pathways

Adsorption / desorption

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Description of key information

Log Koc = 2.0-14.1

Key value for chemical safety assessment

Additional information

No experimental data evaluating the adsorption potential of Glycerides,C14-18 and C16-18 unsaturated, mono-, di- and tri- (CAS No. 91052-28-7) are available. Since the substance is a complex UVCB substance, QSAR estimations using the KOCWIN v2.00 program have been calculated for representative components (C14, C16, C18 saturated and C18 unsatd. fatty acids, mono-, di- and triester). Log Koc values range from 2 (C14 mono-) to 14.1 (C18 tri-)(López Parrón, 2011). The values obtained for the C14, 16, 18 and C18 unsaturated monoester components with the MCI method are reliable and within the applicability domain of the calculation method (log Koc values ranging from 2-3). On the other hand, the estimated log Kow values of the C14, 16, C18 and C18 unsaturated di- and triester components (≥ 11) are outside the Kow range of the training set of the MCI method (-2.11-9.10), and therefore the obtained values should be taken with caution (log Koc values 5.88-14.18). The definite values may not be fully reliable but indicate a high adsorption potential. Generally, longer fatty acid C-chain lengths and higher degrees of esterification (diester, triester) are expected to show higher adsorption potential than shorter and monoester fatty acids, for which reliable values are available. Considering the estimated log Koc range for this substance, 2-14, a high adsorption potential to solid organic particles cannot be excluded.