Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Administrative data

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.