The vapor-liquid equilibrium behavior of 1,4-dihydroxybenzene in methanol or ethanol was measured at atmospheric pressure in the dilute composition range of 1,4-dihydroxybenzene with a recirculation still. Equilibrium compositions were determined with an ultraviolet spectrometer. The reliabilities of liquid and vapor compositions were +/-1 x 10(-6) and +/-1 x 10(-7) mole fraction of 1,4-dihydroxybenzene, respectively. The accuracies of temperature and pressure are +/-0.01 K and +/-0.01 kPa, respectively. The volatilities of 1,4-dihydroxybenzene at infinite dilution were determined to be 0.0013 and 0.0007 in methanol and ethanol, respectively.