Dicyclohexyl phthalate is primarily used as a plasticizer in the production of flexible polyvinyl chloride (PVC) products. It enhances the flexibility, durability, and workability of PVC, making it suitable for applications such as cables, flooring, and synthetic leather. Additionally, it is employed in the manufacture of adhesives, coatings, and inks, where it improves the performance and stability of the final product. Its compatibility with various polymers also makes it useful in specialized industrial applications, including the production of gaskets and seals.