Di-n-octyl sebacate is widely used as a plasticizer in the production of flexible PVC products, such as cables, wires, and synthetic leather, due to its excellent compatibility and low volatility. It enhances the flexibility, durability, and low-temperature performance of these materials. Additionally, it is utilized in lubricants and greases to improve their thermal stability and reduce friction in mechanical systems. In the cosmetics industry, it serves as an emollient in skincare products, providing a smooth texture and improving skin feel. It is also used in the production of paints and inks to improve flow properties and adhesion. Its non-toxic nature makes it suitable for use in medical devices and food-contact materials.