Monobenzyl phthalate is primarily used as a plasticizer in the production of various polymer materials, enhancing their flexibility and durability. It is often incorporated into coatings, adhesives, and sealants to improve their performance and workability. Additionally, it serves as an intermediate in the synthesis of other chemical compounds, particularly in the pharmaceutical and cosmetic industries. Its ability to modify the physical properties of materials makes it valuable in manufacturing processes where specific texture, consistency, or stability is required.