Biotin-PEG2-Hydrazide is widely used in biochemical research for labeling and conjugation purposes. It is particularly effective in biotinylating biomolecules such as proteins, antibodies, and nucleic acids, enabling their detection or isolation through streptavidin-biotin interactions. The hydrazide group allows for specific conjugation to aldehyde or ketone groups, making it useful for modifying glycoproteins or other carbonyl-containing molecules. The PEG2 spacer enhances solubility and reduces steric hindrance, ensuring efficient binding and detection. This compound is commonly applied in immunoassays, protein purification, and diagnostic techniques, where precise and stable biotinylation is required.