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The thermodynamic properties of drug in mixture solvents are of great importance in many processes [1,2].Densities and viscosities of 7-hydroxycoumarin in aqueous ethanol and 1-propanol solutions at T =(293.15,298.15,303.15,308.15 and 313.15)K have been measured.These experimental data have been used to calculate some important parameters,including apparent molar volumes(Vφ),limiting apparent molar volumes(V 0 φ),viscosity B-coefficients of Jones–Dole equation and variation of B with temperature(dB/dT).