1,3-Dioctanoin is primarily used in the food industry as an emulsifier and stabilizer. It helps to maintain the consistency and texture of various food products, such as baked goods, dairy items, and processed foods. In cosmetics and personal care products, it acts as a conditioning agent, providing moisture and improving the feel of skin and hair. Additionally, it is utilized in pharmaceutical formulations as a carrier for active ingredients, enhancing their absorption and effectiveness. Its ability to blend well with other substances makes it a versatile component in multiple industries.