Used as a buffering agent in pharmaceuticals and biological systems to maintain stable pH levels. Commonly found in cell culture media and diagnostic reagents. Serves as a source of phosphorus and potassium in nutrient solutions for tissue culture and microbial growth. Employed in food processing as an emulsifier, stabilizer, and leavening agent, especially in dairy products, processed meats, and baked goods. Utilized in laboratory settings for preparing buffer solutions in biochemical assays and protein purification. Also acts as an electrolyte replenisher in some medical and intravenous formulations.