O-Benzoyl-N-tert-butylhydroxylamine Hydrochloride is primarily utilized in organic synthesis as a reagent for the generation of nitroxyl radicals, which are essential intermediates in various chemical reactions. It is particularly valuable in the preparation of stable free radicals used in studying reaction mechanisms and in the development of spin-labeling techniques for biological systems. Additionally, this compound finds application in polymer chemistry, where it aids in the controlled polymerization processes, ensuring the production of polymers with specific molecular weights and structures. Its role in the synthesis of pharmaceuticals and agrochemicals is also noteworthy, as it facilitates the introduction of functional groups that are crucial for the biological activity of these compounds.