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 fertilizers and nutrient supplements. Employed in food processing as an emulsifier, stabilizer, and acidity regulator, especially in processed cheeses, meats, and canned products. Also utilized in laboratory settings for preparing buffer solutions in biochemical and molecular biology experiments.