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Environmental fate & pathways

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In accordance with column 2 of Annex IX 9.3.2 of EC 1907/2006 bioaccumulation testing in aquatic species is not required as the substance has a low potential to cross biological membranes.

Bioaccumulation of Dipentaerythrol ester of n5/iC9 acids is very unlikely because most components of the substance have a very high molecular weight (> 800 g/mol). It can be expected that the components of the substance are not bioavailable at all. Due to their hydrophobicity, it is very likely that components will adsorb to sediment and particulate matter. Furthermore, steric hindrance at passage of gill membranes or cell membranes of respiratory organs can be very important for substances that have a molecular weight higher than 500 or a molecular size larger than 9.5 A. According to the EU Technical Guidance Documents, substances with a molecular weight higher than 700 are unlikely to bioaccumulate significantly (regardless of the log Pow value).

This is outlied in a detailed expert statement by Hamwijk (2004).