Benzyl Isononyl Phthalate is primarily used as a plasticizer in the production of flexible PVC materials. It enhances the flexibility, durability, and workability of PVC products, making it suitable for applications such as cables, hoses, and flooring. Additionally, it is utilized in the formulation of adhesives and sealants, where it improves their performance and longevity. The compound is also found in certain coatings and inks, contributing to their stability and finish. Its compatibility with various polymers makes it a versatile additive in industrial and consumer products.