Used primarily in the production of plasticizers, especially for polyvinyl chloride (PVC), enhancing flexibility and durability in plastics. It is a key component in making dioctyl phthalate (DOP) and other ester-based plasticizers used in cables, flooring, and films. Also employed in synthesizing lubricants, surfactants, and emollients for cosmetics due to its stability and low volatility. Additionally, it serves as a solvent and intermediate in manufacturing dyes, resins, and coatings.