5'-uridine disodium flavoring agent. It is added to milk to increase the amount of nucleotide so that it is close to the composition of human milk and enhance the resistance of infants. Adjuvant for liver disease. It can be used as intermediates of nucleic acid drugs, health food and biochemical reagents, and can be used in the manufacture of uridine triphosphate (UTP), polyadenuria, flutiron and other drugs.