| Abstract
| - The vapor−liquid equilibrium behavior of 1,4-dihydroxybenzene in methanol or ethanol was measuredat atmospheric pressure in the dilute composition range of 1,4-dihydroxybenzene with a recirculationstill. Equilibrium compositions were determined with an ultraviolet spectrometer. The reliabilities ofliquid and vapor compositions were ±1 × 10-6 and ±1 × 10-7 mole fraction of 1,4-dihydroxybenzene,respectively. The accuracies of temperature and pressure are ±0.01 K and ±0.01 kPa, respectively. Thevolatilities of 1,4-dihydroxybenzene at infinite dilution were determined to be 0.0013 and 0.0007 inmethanol and ethanol, respectively.
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