Used in bioconjugation and drug delivery systems, it serves as a linker to attach polyethylene glycol (PEG) chains to proteins, peptides, or other biomolecules. This modification enhances solubility, stability, and reduces immunogenicity of therapeutic compounds. It is particularly valuable in the development of antibody-drug conjugates (ADCs) and other targeted therapies. Additionally, it plays a role in improving the pharmacokinetic properties of drugs, allowing for prolonged circulation in the body. Its succinimidyl carbonate group ensures efficient and selective coupling with amino groups in biomolecules under mild conditions.