Di-n-octyl phthalate solution is widely used as a plasticizer in the production of flexible PVC products, such as cables, flooring, and synthetic leather. It enhances the flexibility, durability, and workability of these materials. Additionally, it is employed in the formulation of adhesives, coatings, and inks to improve their performance and stability. In industrial applications, it serves as a solvent or carrier fluid in various chemical processes. Its compatibility with polymers and low volatility make it a preferred choice in manufacturing and material science.