Density data for dilute aqueous solutions of 3-amino-1-hydioxybenzene (m-aminophenol), cyanobenzene (benzonitrile), and 2-cyano-1-hydroxybenzene (o-cyanophenol, o-hydroxy-benzonitrile) are presented together with partial molar volumes at infinite dilution calculated from the experimental data. The measurements were performed at temperatures from T = 298.15 K up to either T = 573.15 K (m-aminophenol, benzonitrile) or T = 498.15 K (o-cyanophenol) and at either atmospheric pressure, or at pressures close to the saturated vapor pressure of water, and also at p = 30 MPa. The data were obtained using a high-temperature high-pressure flow vibrating-tube densimeter for measurements at elevated pressures and a commercial vibrating-tube cell DMA 602HT for measurements at atmospheric pressure. (C) 2003 Elsevier Science Ltd. All rights reserved.