Used as a spin trap in electron paramagnetic resonance (EPR) spectroscopy to detect and identify short-lived free radicals in biological systems. The biotin tag allows for subsequent isolation or detection of radical-adducts using streptavidin-based methods, enabling targeted analysis in complex samples such as cell lysates or tissue extracts. Ideal for studying oxidative stress mechanisms and reactive oxygen species formation in biochemical and biomedical research. Supplied in ethanol for direct use in assays requiring organic solvent compatibility.