This compound is widely used in bioconjugation and labeling applications due to its biotin and PEG3 components. The biotin moiety allows for strong and specific binding to avidin or streptavidin, enabling its use in affinity purification, immunoassays, and diagnostic techniques. The PEG3 spacer enhances solubility and reduces steric hindrance, making it ideal for attaching biotin to proteins, peptides, or other biomolecules without disrupting their functionality. It is also employed in drug delivery systems to improve the targeting and stability of therapeutic agents. Additionally, it serves as a valuable tool in research for studying protein interactions, cellular processes, and molecular imaging.