Solubilities of sodium gluconate in water and in aqueous solutions of ethanol and methanol

The solubility of sodium gluconate in water and in aqueous ethanol and meth anol 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 a s a function of temperature and alcohol concentration, with the madmen rela tive 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.