Used primarily in the medical field as a phosphate binder for patients with kidney disease, helping to control high blood phosphate levels by binding phosphates in the food consumed. Commonly prescribed in chronic renal failure cases where the kidneys cannot effectively remove phosphate from the blood.

Also utilized in food industry as a buffer, stabilizer, and texturizing agent. It helps maintain pH levels and improves consistency in processed foods and dairy products. Frequently found in baking powders and as a gelling agent in some confectionery products.

In wastewater treatment, it serves as a source of carbon to support biological processes that remove nitrogen and phosphorus, aiding in the purification of municipal and industrial effluents.

Additionally, used in the production of certain calcium-containing chemicals and in laboratory settings as a reagent for organic synthesis and analytical procedures.