Used as a buffering agent in analytical chemistry to maintain stable pH in solutions. Commonly applied in water treatment processes to control scale and corrosion in industrial boilers and cooling systems. Serves as a nutrient source in microbial culture media for laboratory cultivation of bacteria and other microorganisms. Found in some food products as an emulsifying and stabilizing agent, particularly in processed cheeses and baked goods. Also utilized in fertilizers to supply both nitrogen and phosphorus, supporting plant growth in agriculture.