An interactive software and handbook package that provides a source of reliable data embracing a wide range of properties of chemical substances, mixtures and reacting systems. The handbook and software generate property values at any desired temperature, pressure or mixture composition. The diskette contains algorithms for calculating properties and values based on parameters tabulated in the handbook. For each group of properties, data are given for representative substances of different chemical classes, emphasizing the compounds of the greatest industrial and laboratory importance. Those properties that are functions of temperature, pressure, or composition are presented as equations with tabulated coefficients. Properties presented in the handbook include: physical constants, phase transition properties, and thermodynamic properties of pure substances; enthalpy and gibbs energy of formation; surface tension; vapour liquid, liquid-liquid, and solid-liquid equilibrium properties of binary mixtures; azeotrophic data; viscosity; thermal conductivity; diffusion coefficients.