Used in bioconjugation chemistry, particularly in inverse electron-demand Diels-Alder (IEDDA) reactions, enabling rapid and selective labeling of biomolecules in live cells. Its fast kinetics and bioorthogonality make it ideal for imaging, targeted drug delivery, and pretargeted radioimaging applications. Commonly employed in the development of antibody-drug conjugates and PET tracers where high specificity and minimal background reactivity are critical. Also utilized in materials science for surface functionalization and polymer modification due to its stable and reactive tetrazine core.