Used primarily as a spin label in electron paramagnetic resonance (EPR) spectroscopy, this compound aids in studying molecular dynamics and structural properties of proteins, membranes, and other biological systems. Its stable free radical nature allows it to act as a probe, providing insights into local environments and interactions within complex macromolecules. Additionally, it is employed in research involving oxidative stress and free radical chemistry, helping to understand mechanisms of damage and protection in biological systems. Its application extends to materials science, where it is used to investigate polymer dynamics and stability.