Sodium hydrogen phosphate, also known as disodium phosphate, is a white powder or granular solid commonly used in food processing, water treatment, and as a buffering agent in various chemical and medical applications. It is a source of phosphorus, an essential nutrient for plants and animals, and is often used as a dietary supplement. Sodium hydrogen phosphate is also used in the production of detergents and cleaning products, as well as in the manufacture of ceramics, textiles, and paper. In the food industry, it is used as an emulsifier, stabilizer, and thickening agent. Sodium hydrogen phosphate has a variety of other industrial and laboratory applications, including as a flame retardant, corrosion inhibitor, and in DNA extraction and purification.