The simplified mapping. Determination of the human bioconcentration factor (hBCF) as a function of the unbound intrinsic hepatic clearance CLuint (l h−1) and the free fraction in plasma, fu. The logarithmic scale of hBCF is marked on the boundaries separating the coloured fields. The predictions are done using an approximation of the hBCF value computed with the PBTK model for the 96 selected compounds. For the sake of comparison, the top twenty ranking obtained with the complete model is indicated (filled white circle). Compounds are represented using the following labelling: circles, ‘open circle’, are for pharmaceutical compounds, crosses, ‘multiple sign’, are for plant protection products (insecticide, pesticide,…) squares, ‘open square’, are for industrial chemicals and triangles, ‘inverted filled triangle’, are for natural products (alkaloid, hormone, …). Compounds without liver clearance, i.e., CLuint = 0, are arbitrary placed on the map at a log value of −5