This chemical is primarily used as a spin label in electron paramagnetic resonance (EPR) spectroscopy. It helps in studying the dynamics and structure of biomolecules, such as proteins and nucleic acids, by attaching to specific sites and providing information on their motion and environment. Additionally, it is employed in polymer chemistry to investigate the behavior and interactions of polymer chains. Its stable free radical nature makes it valuable for probing molecular systems without significantly altering their properties.