Used in drug delivery systems to improve solubility and circulation time of therapeutic agents. Acts as a linker in bioconjugation, connecting drugs, proteins, or peptides to targeting molecules or nanoparticles. Commonly employed in the development of PEGylated biopharmaceuticals to reduce immunogenicity and enhance stability. Applied in tissue engineering and regenerative medicine as a building block for hydrogels and biocompatible scaffolds. Also utilized in diagnostic imaging to attach contrast agents to targeting moieties, improving specificity and in vivo performance.