Azide-PEG3-Sulfone-PEG3-azide is widely used in bioconjugation and chemical biology due to its dual azide functional groups, which enable efficient click chemistry reactions. It serves as a linker in the synthesis of complex molecules, particularly in the development of bioconjugates for targeted drug delivery systems. The PEG spacers enhance solubility and reduce steric hindrance, making it suitable for attaching biomolecules like proteins, peptides, or antibodies to other functional entities. Additionally, it is employed in the preparation of hydrogels and polymeric materials for biomedical applications, such as tissue engineering and controlled release systems. Its sulfone group further allows for selective reactivity, facilitating precise modifications in chemical synthesis.