11-Aminoundecanoic acid is primarily used as a monomer in the production of nylon-11, a high-performance polyamide known for its excellent mechanical properties, chemical resistance, and durability. This polymer is widely utilized in applications such as automotive components, fuel lines, and flexible tubing due to its ability to withstand harsh environments. Additionally, it serves as a building block in the synthesis of specialty chemicals, including surfactants and corrosion inhibitors, which are essential in industrial and manufacturing processes. Its biocompatibility also makes it suitable for use in medical devices and drug delivery systems.