Dielectric constant, dipole moment, and solubility parameters are reported for ethylene carbonate (EC), propylene carbonate (PC), butylene carbonate (BC), and glycerin carbonate (GC). Dielectric constants have been determined from capacitance measurements using an auto-balancing bridge at 20, 25, and 40 degrees C. Values of permanent dipole moment of carbonates have been obtained from dielectric constant measurements on dilute solutions of carbonates in benzene and 1,4-dioxane. Hildebrand and Hansen solubility parameters of carbonates have been calculated using several different techniques.