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Environmental fate & pathways

Biodegradation in soil

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Description of key information

Not relevant due to enhanced ultimate biodegradation.

Key value for chemical safety assessment

Additional information

In ready biodegradation tests conducted according to EU method C.4-C and GLP (1,2,4-Benzenetricarboxylic acid, mixed decyl and octyl triesters; CAS No. 90218-76-1), it is demonstrated that biodegradation of the PFAE aromatics category members continue beyond the 28 day test period, which results in a biodegradation above 70% after a test period of 43 days and 48 days, respectively.

As the screening criteria for persistency listed in table R.11-2 of the “Guidance on information requirements and chemical safety assessment: chapter 11: PBT assessment (ECHA, 2012d) is passed under the strict conditions of enhanced ready biodegradation tests, it can be concluded that the test substances are not persistent in the environment and soil simulation testing is not required. As stated in ECHA Guidance on information requirements and chemical safety assessment, Chapter 7b, a simulation test would provide little additional data as rapid mineralisation in the environment is already assumed (ECHA, 2012b).