Octadec-9-enedioic acid finds its application primarily in the field of polymer chemistry, where it is used as a monomer for the synthesis of polyesters and polyamides. Its bifunctional nature, with two carboxylic acid groups, allows it to form long-chain polymers that exhibit desirable properties such as flexibility and durability. These polymers are often utilized in the production of coatings, adhesives, and elastomers, contributing to materials that require resistance to environmental stressors like heat and chemicals.

In the cosmetics industry, this compound is valued for its emollient properties, making it a component in skincare formulations that aim to improve skin texture and hydration. Its ability to integrate into lipid layers of the skin helps in maintaining moisture and enhancing the skin's barrier function.

Moreover, Octadec-9-enedioic acid is explored in the development of biodegradable plastics, offering a more environmentally friendly alternative to conventional petroleum-based plastics. Its potential in creating sustainable materials aligns with the growing demand for green chemistry solutions in various industrial applications.