Used in bioconjugation processes to modify proteins and peptides for enhanced stability and targeted delivery in immunotherapeutic applications. Its aldehyde group enables site-specific coupling with amino-oxy or hydrazide-containing molecules under mild conditions, making it valuable in the development of antibody-drug conjugates (ADCs) and diagnostic probes. Frequently applied in cancer research to label immune cell markers without disrupting biological function. Also utilized in surface engineering of biosensors and functionalized nanoparticles for selective binding studies.