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Environmental fate & pathways

Hydrolysis

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Description of key information

Hydrolysis is not relevant with regard to abiotic degradation in the environment.

Key value for chemical safety assessment

Additional information

No experimental study is available for 3,5,5 trimethylhexanoic acid, mixed esters with dipentaerythritol (CAS 84418-63-3) investigating the abiotic hydrolysis. In accordance with column 2 of Annex VIII 9.2.2.1 of (EC) No 1907/2006 the testing is not required as the substance is highly insoluble in water. The water solubility of 3,5,5 trimethylhexanoic acid, mixed esters with dipentaerythritol is < 10 µg/L at 20 °C. However, hydrolysis rates for the main components of 3,5,5 trimethylhexanoic acid, mixed esters with dipentaerythritol were calculated using HYDROWIN v2.00 (Szymoszek, 2015). The results show that the abiotic hydrolysis is not a relevant degradation pathway (6.7 - 9.9 yr at pH 7; 240 - 360 days at pH 8).