9-Oxononanoic acid is primarily used in organic synthesis and research applications. It serves as a key intermediate in the production of various chemicals, including polymers and specialty materials. Its carbonyl and carboxylic acid functional groups make it a versatile building block for creating complex molecules. In the field of materials science, it is employed in the development of coatings, adhesives, and resins due to its ability to modify surface properties and enhance durability. Additionally, it finds use in the synthesis of bioactive compounds and pharmaceuticals, where its structure contributes to the development of drug candidates with specific functional properties. Its role in industrial chemistry also extends to the production of lubricants and surfactants, where it helps improve performance and stability.