The partition coefficient of eight N2-substituted phenazines was measured at four temperatures (range 20-55°C) in the n-octanol/water system. The apparent molal partition coefficients, Km', were calculated from the distribution results. Plots of log Km vs. T-1 were linear and the thermodynamic parameters for the solute transfer were evaluated from the Van't Hoff isochore. A relationship between log Km and log P was derived. © 1990.