Butyl decanoate is primarily used as a flavoring agent in the food industry due to its fruity and pleasant aroma. It is commonly incorporated into food products such as baked goods, candies, and beverages to enhance their flavor profiles. In the cosmetics and personal care industry, it serves as an emollient and fragrance ingredient, providing a smooth texture and pleasant scent to products like lotions, creams, and perfumes. Additionally, it is utilized in the production of lubricants and plasticizers, where it acts as a solvent or additive to improve the performance and flexibility of materials. Its low toxicity and stability make it a versatile compound in various industrial applications.