Registration Dossier

Diss Factsheets

Environmental fate & pathways

Adsorption / desorption

Currently viewing:

Administrative data

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 of 2-Butenedioic acid (E)-, di-C14-16-alkyl esters (List No. 695-949-6) are available. Using KOCWIN Program (v2.00), log Koc values in the range of 8.53 – 9.61 and 7.23 – 8.27 were calculated for its components, based on log Kow and on the molecular conductivity index (MCI), respectively (Nagel, 2014). These models have no universally accepted definition of its 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 indicate a high adsorption potential, which is also to be expected based on the high calculated log Kow value of the components (13.98 – 15.95) and the low measured water solubility (< 0.05 mg/L) of this UVCB substance. However, using KOCWIN Program (v2.00) and calculating the log Koc value for a fumarate with an even smaller fatty alcohol constituent, i.e. 2-Butenedioic acid (E)-, di-C8-18-alkyl esters, CAS 68610-90-2, characterized by a smaller fatty alcohol (C8) constituent, it is within the training set and the result is fully reliable indicating a high potential for adsorption (Koc = 5.27, based on Kow and Koc = 4.12 based on MCI). The adsorption potential for this this UVCB substance is expected to be higher, due to the longer hydrocarbon side chains, which indicate a higher lipophilicity of these components.

Based on this information, it can be assumed that the adsorption potential of 2-Butenedioic acid (2E)-, di-C14-16-alkyl esters (List No 695-949-6) is high.