Densities and refractive indices at the temperature 298.15 K of {x(1) CH3COCH3 + x(2)CH(3)OH + (1-x(1)-x(2))CH3(CH2)(4)OH} and of the corresponding binary mixtures : {xCH(3)COCH(3) + (1-x)CH3(CH2)(4)OH}, and {xCH(3)OH + (1-x)CH3(CH2)(4)OH}, have been determined experimentally as a function of the mole fraction at atmospheric pressure. Values of densities were determined by an Anton-Paar DMA 46 densimeter and refractive indices by the automatic refractometer ABBEMAT-HP Dr Kernchen. Variable-degree polynomials have been fitted to the results.