Biotin-PEG3-oxyamine is widely used in bioconjugation and molecular labeling applications. Its biotin moiety allows for strong binding to avidin or streptavidin, making it valuable in affinity chromatography, immunoassays, and protein purification. The PEG3 spacer enhances solubility and reduces steric hindrance, improving the efficiency of biotinylation reactions. The oxyamine group enables selective conjugation with aldehydes or ketones, facilitating the labeling of carbohydrates, glycoproteins, or other biomolecules with carbonyl groups. This compound is particularly useful in proteomics, glycomics, and the development of biotinylated probes for diagnostic and research purposes.