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Environmental fate & pathways

Adsorption / desorption

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Description of key information

logKoc: > 3 (KOCWIN v2.00)

Key value for chemical safety assessment

Koc at 20 °C:
3.88

Additional information

No experimental studies investigating the adsorption/desorption potential of 2-hydroxyethyl palmitate (EC n°224-160-8) are available.

As the substance is composed of different homologues which are constituents of

Fatty acids, C16-18, esters with ethylene glycol (CAS 91031 -31 -1), and as the two substances are structurally very close, the prediction made for adsorption/desorption potential of Fatty acids, C16-18, esters with ethylene glycol (CAS 91031 -31 -1) was estimated relevant for

2-hydroxyethyl palmitate (EC n°224-160-8).

The log Koc values were calculated for representative components using KOCWIN v2.00 based on the Molecular Connectivity Index (MCI) (Müller, 2013). This model has no universally accepted definition of model domain. Since some of the components (diester components) are outside the log Kow range of the training set of the MCI model, the results should be taken with caution. The definite values may not be fully reliable, but indicate a high adsorption potential, which is also to be expected based on the high log Kow (> 10). However, the log Koc value for the monoester components of the substance are within the training set and the result is fully reliable indicating a high potential for adsorption (log Koc 3.36 - 3.88). Since the log Koc increases with the length of the fatty acid chain, it can be assumed that the adsorption potential of

2-hydroxyethyl palmitate, composed ofpalmitic acid esters

with ethylene glycol, is high.