Vapor-liquid equilibrium data, heat of mixing (excess enthalpies), and volumetric properties of systems are required for both the applications in design of industrial technological processes and the understanding the structure and the intermolecular interactions in the systems. On the basis of classical thermodynamics the measured experimental data combined together enable us the calculation of non-measurable thermodynamic properties significant for the technological calculations. The present volume is a compilation of experimental and derived property data on subcritical binary homogeneous (single-phase) or heterogeneous (two-phase) liquid–liquid mixtures. All the components are well-defined pure substances, which are organic nonelectrolytes and water. The present volume is divided into three subvolumes (A, B, C). 800 representative data sets that cover all types of properties and chemical systems are selected for Subvolume A. While Subvolume B comprises 1032 data sets for binary mixtures containing one or two hydrocarbons, Subvolume C is providing 1014 data sets for non-hydrocarbon binary mixtures.