Primarily used in the field of organic chemistry as a stable free radical, it serves as a spin label in electron paramagnetic resonance (EPR) spectroscopy. This application is crucial for studying the structure and dynamics of complex molecules, particularly in biological systems. It helps researchers understand molecular interactions and conformational changes in proteins and other macromolecules. Additionally, it is employed in the synthesis of advanced materials, where its radical nature aids in the development of polymers with specific electronic properties. Its stability and reactivity make it a valuable tool in both research and industrial applications.