Hazbref2

E: The substance is regarded as absorbtiv (the substance is not mobile) if the following parameter are met. In this case the decision is to be answered with yes:
• Adsorptivity log K oc ≤ 4 (L/kg or dimensionless), test guideline OECD 106 or OECD 121 (HPLC-method) or calculation from log K ow . The organic carbon / water partition coefficient may only be measured or calculated for non-ionisable organic chemicals.
• Octanol-water distribution ratio log D ow ≤ 4 (dimensionless, calculation from log K ow and pK a ). The octanol-water distribution ratio (D ow ) is a measure of K ow that accounts for the pH dependency of an ionisable organic chemical, and is a measure of the distribution of dissociated and non-dissociated species in octanol and water as a function of pH (ECETOC Technical Report 123 (2014) – Environmental risk assessment of ionisable compounds (https://www.ecetoc.org/publication/tr-123-environmental-risk-assessment-of-ionisable-compounds/), Section “Partition coefficient (K OW ) and distribution ratio (D OW )

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