O-Butylhydroxylamine is primarily used as a reducing agent in various chemical reactions, particularly in organic synthesis. It is effective in converting nitro compounds to amines, which is a crucial step in the production of pharmaceuticals, dyes, and agrochemicals. Additionally, it serves as a stabilizer in polymerization processes, preventing unwanted side reactions and ensuring the quality of the final polymer product. In the field of analytical chemistry, it is employed as a derivatization agent to enhance the detection and quantification of certain compounds in complex mixtures. Its ability to scavenge free radicals also makes it useful in formulations aimed at protecting materials from oxidative degradation, such as in coatings and plastics.