Used as a complexing agent in Fehling's solution to test for reducing sugars, where it stabilizes copper ions in alkaline solution. Commonly employed in electroplating baths to improve metal deposit quality by controlling ion availability. Applied in pharmaceutical formulations as a mild laxative and to enhance solubility of certain drugs. Utilized in food industry as an emulsifier and acidity regulator, particularly in beverages and baking powders. Also found in analytical chemistry for calibration of polarimeters due to its consistent optical activity.