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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

0.500 estimated log BCF from regression -based method (Direct Red 23 neutral form)

Key value for chemical safety assessment

BCF (aquatic species):
3.162 L/kg ww

Additional information

BCF of Direct Red 23 (DR23) neutral form was calculated using the software EpiSuite 4.1., the suite of physical/chemical property and environmental fate estimation programs developed by the EPA’s Office of Pollution Prevention Toxics and Syracuse Research Corporation (SRC). DR23 is expected as a substance with a low potential for bioaccumulation.

The partition coefficient log Kow of 0.0019 (R&C, 2012) confirms this previsional consideration and based on REACH regulation annex IX column 2 (specific rules for adaptation from column 1) the study need not be conducted if the substance has a low potential for bioaccumulation (for instance a log Kow < 3) and/or a low potential to cross biological membranes.