4-Ethylphenol is widely used in the flavor and fragrance industry due to its distinct smoky and phenolic aroma. It is often incorporated into food products, such as smoked meats, cheeses, and beverages, to enhance or replicate smoky flavors. In perfumery, it serves as a key ingredient in creating complex scents, particularly in woody or leathery fragrances. Additionally, it is utilized in the production of certain pharmaceuticals and agrochemicals as an intermediate or additive. Its antimicrobial properties also make it valuable in preservative formulations for various industrial applications.