11-Hydroxyundecanoic acid is primarily used in the synthesis of specialty polymers and biodegradable plastics, such as bio-polyesters like polyhydroxyalkanoates (PHA). Its hydroxyl group makes it a valuable intermediate in the production of polyesters and polyamides, which are utilized in eco-friendly packaging materials and biomedical applications. Additionally, it serves as a precursor in the manufacture of lubricants and surfactants, contributing to their enhanced performance and environmental compatibility. In the cosmetic industry, it is employed in the formulation of skincare products due to its moisturizing and stabilizing properties. In the pharmaceutical sector, it is used in the synthesis of drugs and various bioactive substances that offer medical benefits. Its versatility also extends to the development of adhesives and coatings, where it improves durability and adhesion.