2-Undecenoic acid is primarily used as an antifungal agent, particularly in the treatment of fungal infections such as athlete's foot and ringworm. Its effectiveness in inhibiting the growth of fungi makes it a key ingredient in various topical creams, ointments, and powders designed for skin care. Additionally, it is utilized in the formulation of antifungal sprays for footwear to prevent the recurrence of infections. Beyond its medical applications, 2-undecenoic acid is also employed in the production of fragrances and flavoring agents due to its characteristic odor. In industrial settings, it serves as an intermediate in the synthesis of other chemicals, including plasticizers and lubricants. Its versatility and antifungal properties make it a valuable compound in both healthcare and manufacturing industries.