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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Link to relevant study record(s)

Description of key information

Waiver based on log Kow<3

Key value for chemical safety assessment

Additional information

Reliable measured bioconcentration information is not available for FX511. In accordance with column 2 of Annex IX of the REACH Regulation (9.3.2 Bioaccumulation in aquatic species) the study need not be conducted if the substance has a low potential for bioaccumulation, specifically where the log Kow is <3. Walker (2012) determined the partition coefficient (Kow) to be 951 and the log Kow to be 2.98, therefore the requirement for a bioaccumulation study is waived.


FX511 is unlikely to bioaccumulate in aquatic organisms. No further testing is required.