O-(1-Methyl-allyl)-hydroxylamine hydrochloride is primarily utilized in organic synthesis as a versatile building block for the preparation of various nitrogen-containing compounds. It serves as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of molecules with potential therapeutic activities. The compound is often employed in the formation of oximes and other functional groups, which are crucial in drug design and development. Additionally, it finds application in the modification of polymers and materials, where its reactive hydroxylamine group can introduce specific functionalities or cross-linking sites. Its role in research and industrial processes highlights its importance in advancing chemical innovations and material science.