Isothermal and isobaric vapor-liquid equilibria data for the binary system trimethylbenzoquinone + n-hexanol, measured with an inclined ebulliometer are presented. The experimental results are analysed using the UNIQUAC equation with the temperature-dependent binary parameters with satisfactory results. Experimental vapor pressures of trimethylbenzoquinone and n-hexonal are also included. (C) 2004 Elsevier B.V. All rights reserved.