Used primarily in the medical field as a phosphate binder to control serum phosphorus levels in patients with chronic kidney disease, especially those on dialysis. It works by binding to dietary phosphate in the gastrointestinal tract, preventing its absorption into the bloodstream.

Commonly used as a food additive (E263) to preserve texture and act as a preservative in baked goods, sauces, and processed cheeses. It helps maintain consistency and prolong shelf life.

In industrial applications, it serves as a mordant in dyeing processes, improving the fixation of dyes on fabrics. It is also used in the production of acetate esters and as a catalyst or buffering agent in chemical synthesis.

Used in wastewater treatment to provide a carbon source for denitrifying bacteria, aiding in the removal of nitrates from water.