Dihidrogénfoszfát

Dihidrogénfoszfát is an anion with the chemical formula H2PO4-. It is one of the three common phosphate ions, along with hydrogenphosphate (HPO4^2-) and phosphate (PO4^3-). Dihidrogénfoszfát is the conjugate acid of hydrogenphosphate and the conjugate base of phosphoric acid (H3PO4). It plays a crucial role in biological systems, particularly as a component of the phosphate buffer system, which helps maintain the pH balance in cells and blood.

In chemistry, dihidrogénfoszfát is often found as a salt with various cations. For instance, sodium dihidrogénfoszfát (NaH2PO4) and potassium dihidrogénfoszfát (KH2PO4) are common laboratory reagents. These salts are soluble in water and are used in a variety of applications, including as food additives (e.g., for leavening agents in baking, as emulsifiers), in water treatment, and in fertilizer production. The exact speciation of phosphate ions in solution, including the presence of dihidrogénfoszfát, is dependent on the pH of the solution. At lower pH values, dihidrogénfoszfát is the dominant species.