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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

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Diss Factsheets

Environmental fate & pathways

Adsorption / desorption

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Link to relevant study record(s)

Description of key information

log Koc: > 5 (KOCWIN v2.00)

Key value for chemical safety assessment

Additional information

No studies investigating the adsorption/desorption behaviour offatty acids, C8-10, tetraesters with pentaerythritol (CAS 85586-24-9)are available. Using KOCWIN Program (v2.00), log Koc values of 7.78 – 9.95 and 9.38 - 11.47 were calculated, based based on log Kow and on molecular connectivity index (MCI), respectively (Hopp, 2011). These models have no universally accepted definition of model domain, but since the substance is outside the Kow range of the training set, the results should be taken with caution. The definite values may not be fully reliable, but confirmed the high adsorption potential determined in the experimental study. The potential for adsorption is also to be expected based on the high Kow (> 12.63). Additionally, the log Koc value was calculated for the C5 FA main component of the group memberfatty acids, C5-9 tetraesters with pentaerythritol(CAS 67762-53-2) which has the same structure as one of the components of the target substance, except for the shorter fatty acid chains. The C5 FA component fits in the domain of the training set, and the resulting log Koc values 4.52 (based on Koc) and 6.25 (based on MCI), are reliable. The adsorption potential forfatty acids, C8-10, tetraesters with pentaerythritol (CAS 85586-24-9)is expected to be higher, due to the length of the fatty acid chain.