What is a Zirconium phosphate (Zr(HPO₄)₂·H₂O)?

Zirconium phosphate (Zr(HPO₄)₂·H₂O) is an inorganic compound composed of zirconium and phosphate, typically appearing as a white or off-white solid. It features a layered crystalline structure with excellent thermal and chemical stability, making it useful in various fields. Its most notable property is ion-exchange capability. It can exchange cations like sodium, hydrogen, or heavy metals, making it valuable for water purification, radioactive waste treatment, and as a catalyst support. In medicine, it's developed as a phosphate binder for patients with kidney disease to control blood phosphate levels.

Due to its layered structure, it is also used in nanocomposites, polymer composites, and advanced materials such as proton-conducting membranes. It’s typically synthesized by reacting zirconium salts with phosphoric acid in aqueous solution. Zirconium phosphate is considered environmentally friendly and safe due to its stability.

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