Used primarily in bioorthogonal chemistry due to its ability to undergo rapid inverse electron-demand Diels-Alder reactions with strained alkenes and alkynes. This makes it valuable in labeling biomolecules in live cells without interfering with natural biochemical processes. Commonly employed in imaging, drug delivery systems, and targeted therapy where selective and fast conjugation is required. Also utilized in materials science for constructing functional polymers and responsive nanomaterials through click chemistry approaches.