Sodium gluconate is a sodium polyhydroxy carboxylic acid, which is white or light yellow crystalline particles or powder, with the molecular formula C6H11Na07. It is easily soluble in hot or cold water, slightly soluble in ethanol, and insoluble in ether. Sodium gluconate has good effect of retardation and excellent flavor, and is widely used in construction as retarder, washing, food and medicine and other fields.