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Environmental fate & pathways


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Description of key information

Hydrolysis is not a relevant pathway due the ready biodegradability of the members of the PFAE linear category.

Key value for chemical safety assessment

Additional information

In accordance with Annex VIII, column 2 ( of Regulation (EC) No. 1907/2006, the testing for hydrolysis as a function of pH is not required as all members of the PFAE linear category are readily biodegradable. In addition, QSAR calculations (HYDROWIN v2.00) also indicate, that hydrolysis represents a negligible pathway for the environmental fate of the members of the PFAE linear in the environment (DT50 [pH 7] > 1 yr). Furthermore, a valid experimental study with Diputyl adipate (CAS 105-99-7) supports the QSAR predictions by reporting a very long half time of 1850 days at pH 7 at 25 °C (OECD 111, METI, 1995). This assumption of lack of relevance of abiotic degradation is in line with the assessment of substances as defined by the US-EPA "Aliphatic Diester Category" (US-EPA, 2010).