The interdiffusion coefficient D-aw of six hydrophobic benzene derivatives (a = chlorobenzene, 1,2-dichlorobenzene, 1,4-dichlorobenzene, bromobenzene, 1,2-dibromobenzene, 1,4-dibromobenzene) in aqueous solution (w) at 25 degrees C is measured at different concentrations below 10(-5) solute mole fractions using the Taylor dispersion technique. On the basis of the experimental uncertainty around 4%, a distinct concentration dependence is not recognizable. Analysis of the interdiffusion coefficients with the Stokes-Einstein equation shows greater D-aw(infinity) values than expected from the limit of a complete solute-solvent contact ("stick limit"), and in addition substance-specific deviations. Chemical engineering correlations for D-aw(infinity) presently available from the literature yield unsatisfactory results for this class of predominantly hydrophobic compounds.