Used primarily in bioconjugation and chemical biology, this compound serves as a linker molecule to connect biomolecules, such as proteins or peptides, to other entities like drugs, dyes, or solid supports. Its PEG (polyethylene glycol) spacer enhances solubility and reduces steric hindrance, making it ideal for creating stable and functional conjugates. It is particularly valuable in antibody-drug conjugates (ADCs) for targeted cancer therapy, where it ensures efficient delivery of cytotoxic agents to specific cells. Additionally, it is employed in surface modification of nanoparticles and in the development of diagnostic tools, enabling precise detection and imaging in biomedical research.