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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

The aquatic BCF of a substance is probably lower than 2000 L/kg as the calculated log Kow is higher than 10. The experimentally derived value of Log Kow for the substance is greater than 9.4.

Key value for chemical safety assessment

Additional information

In accordance with Annex IX column 2 of the REACH Regulation, a study for bioaccumulation does not need to be conducted if the substance has a low potential for bioaccumulation. The experimentally derived Log Pow value for the substance has been identified as > 9.4. QSAR calculations of Log Pow for the components determined that Log Pow >10 for the majority of the components. ECHA Guidance on Information requirements and chemical safety assessment Chapter R11: PBT assessment (page 28) on determination of bioaccumulation potential states: The aquatic BCF of a substance is probably lower than 2000 L/kg if the calculated log Kow is higher than 10. A study is therefore considered scientifically unjustified with regard to the low bioaccumulative potential of the substance.