Widely used in biochemical research for studying cell surface interactions and glycoprotein synthesis. Plays a key role in the production of sialylated glycoconjugates, which are important in immune response and cell signaling. Commonly employed as a donor substrate in enzymatic reactions involving sialyltransferases. Used in the development of therapeutic glycoproteins and vaccines to ensure proper sialylation, which affects stability and efficacy. Also applied in studies of viral infection mechanisms, as many viruses bind to sialic acid residues on host cells. Its sodium salt form enhances solubility and stability in aqueous solutions, making it suitable for in vitro and cell-based assays.