The solubility of sodium gluconate in water and in aqueous ethanol and methanol solutions was measured, over the temperature range 10 degrees C to 50 degrees C. The measurements were performed with ethanol solutions of (0 to 1.2) g of ethanol/g of water and with methanol solutions of (0 to 1.4) g of methanol/g of water. An equation was derived to calculate the solubility as a function of temperature and alcohol concentration, with the madmen relative deviation between experimental and calculated solubility values < 4% (congruent to 0.0035 g of sodium gluconate/g of water) for both ethanol and methanol systems.