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Environmental fate & pathways

Adsorption / desorption

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Description of key information

Kow method:

Koc: 3.854

logKoc: 0.586

Key value for chemical safety assessment

Koc at 20 °C:
3.854

Additional information

Koc of Direct Red 23 (DR23) neutral form was calculated using 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 to be a substance with a low potential for adsorption, as confirmed by the partition coefficient log Kow of 0.0019 (R&C, 2012).

Based on REACH regulation annex VIII column 2 (specific rules for adaptation from column 1) the study need not be conducted based on the physicochemical properties the substance can be expected to have a low potential for adsorption (e.g. the substance has a low octanol water partition coefficient).

[LogKoc: 0.586]