TABLE I

Model Compounds and Their Associated Partition Coefficients

Group1Compound NameCodeLog Po/w2Log Ph/w3
1Benzoic acidBA1.70−1.00
Dimethyl phthalateDMP1.560.760
Diethyl phthalateDEP2.471.85
Dibutyl phthalateDBP4.723.85
2p-Toluic acid (4-Methyl benzoic acid)MBA2.34−0.350
4-Ethylbenzoic acidEBA2.970.400
4-Butylbenzoic acidBBA3.661.78
3AnilineAN0.900−0.080
AcetanilideAD1.16−1.88
Ethyl 4-aminobenzoateEAB1.86−0.360
Butyl 4-aminobenzoateBAB3.020.656
44-Methylbenzyl alcoholMBOH1.58−0.100
Ethyl 4-hydroxybenzoate (ethyl paraben)EHB2.47−0.870
p-Hydroxy benzoic acid, n-butyl ester (butyl paraben)BHB3.570.390
  • 1 Compounds were grouped for analytical reasons.

  • 2 Octanol/water partition coefficient.

  • 3 Hexane/water partition coefficient.