Registration Dossier

Environmental fate & pathways

Biodegradation in water and sediment: simulation tests

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Description of key information

Sediment degradation half-life [M3T]: OECD 308 study ongoing

Key value for chemical safety assessment

Additional information

The definitive OECD 308 study is ongoing. A placeholder EPSR is presented in the IUCLID containing details of the test system, sampling and analytical methods, and kinetic analysis of the available data. Sacrifice of the final test vessel (day 100) is planned for 22nd November 2018, with subsequent analysis and reporting. It was proposed to submit an update containing this result by 28th February 2019, however it has proved necessary to conduct further work to identify unknown components. A dossier update with the result of the study will be submitted at the earliest opportunity after the study is finalised.

The chemical safety assessment according to REACH Annex I indicates that it is not necessary to conduct the simulation test on ultimate degradation in surface water, because the risk characterisation ratios (RCRs) for the aquatic compartment, even with the conservative assumption that the parent substance is not biodegradable, are <1.