Used as a buffering agent in food and pharmaceutical formulations to maintain stable pH levels. Commonly found in baking powders, where it acts as an acidulant to control the release of carbon dioxide during baking. Employed in analytical chemistry for the preparation of reagents, such as in Fehling's solution for detecting reducing sugars. Also utilized in the textile industry for improving dye solubility and color fastness. In electroplating, it helps stabilize metal ion concentrations in plating baths. Serves as a chelating agent in cleaning products to bind metal ions and prevent interference with surfactants.

Additionally, in the cosmetics industry, it functions as a preservative and pH stabilizer in products like lotions and skin creams.