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Environmental fate & pathways

Adsorption / desorption

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Description of key information

17.27

Key value for chemical safety assessment

Koc at 20 °C:
17.27

Additional information

Based on REACH regulation annex VIII column 2 (specific rules for adaptation from column 1) the study need not be conducted if 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); logKow is 0.8.

Nevertheless note that Malachite Green (MG) is a cationic dye and cations generally adsorb more strongly to organic carbon and clay than their neutral counterparts.

Koc was however estimated using calculation software EpiSuite 4.1, for completeness sake.

For a more realistic prevision pattern the values of MG kow, melting point, water solubility were added.

Koc MCI method: 97720

Koc Kow method: 17.27