The conductances, densities, and viscosities of aqueous solutions of sodium chlorate were determined over the complete range of concentration at 25 °C and at 35 °C. An attempt was made to reproduce the results at 25 °C with the viscosity-corrected Falkenhagen–Leist and Wishaw–Stokes equations. The limiting equivalent conductances of sodium chlorate at 25 °C and 35 °C in water were also determined.The conductances, densities, and viscosities of sodium chlorate at 25 °C and 35 °C were determined in a solvent consisting of 64.5% dioxane, 35.5% water. The limiting equivalent conductances of sodium chlorate at 25 °C and 35 °C and of lithium chlorate at 25 °C in this solvent were determined by analyzing the data with the Fuoss–Onsager equation for associated electrolytes.Finally, conductances of sodium chlorate and lithium chlorate at 25 °C were determined in a solvent consisting of 90% dioxane, 10% water.