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.

Also utilized in the food industry as a buffer and stabilizer, enhancing texture and shelf life in products like baked goods and ready-to-eat meals. Acts as a source of calcium in nutritional supplements and fortified foods.

In industrial applications, it serves as a mordant in dyeing processes, improving the fixation of dyes on fabrics. Additionally, used in the production of certain calcium-containing chemicals and as a concrete additive to accelerate setting in cold weather conditions.