This chemical is widely used in bioconjugation and click chemistry applications due to its dual azide functional groups and PEG spacer. It serves as a versatile linker for attaching biomolecules, such as proteins, peptides, or antibodies, to other molecules or surfaces. The PEG4 spacer enhances solubility and reduces steric hindrance, making it ideal for creating stable and biocompatible conjugates. It is particularly useful in drug delivery systems, where it facilitates the targeted delivery of therapeutic agents. Additionally, its azide groups enable efficient reactions with alkyne-functionalized compounds via copper-catalyzed azide-alkyne cycloaddition (CuAAC), a cornerstone of click chemistry. This makes it valuable in the development of diagnostic probes, biophysical studies, and material science applications.