This chemical is widely used in bioconjugation and click chemistry applications due to its reactive DBCO (dibenzocyclooctyne) group, which enables strain-promoted azide-alkyne cycloaddition (SPAAC) reactions. It is particularly valuable in labeling biomolecules, such as proteins, peptides, and antibodies, without the need for copper catalysts, making it suitable for sensitive biological systems. The PEG4 spacer enhances solubility and reduces steric hindrance, improving the efficiency of conjugation. Additionally, its sulfonate group increases water solubility, making it ideal for use in aqueous environments. This compound is commonly applied in drug delivery systems, diagnostic assays, and the development of targeted therapeutics.