"Logarithm of Octanol Water Partition Coefficient"@en . . . . "A dimensionless ratio that is the logarithm of the ratio of a compound's concentration within a two phase mixture of octanol and water at equilibrium. More simply, it is a comparison of the solubilities of the compound solute in these two immiscible liquids. This property is used to measure the lipophilicity and the hydrophilicity of a substance." . . .