2-Ethylbutyraldehyde is primarily used as an intermediate in the synthesis of various chemicals, including flavors, fragrances, and pharmaceuticals. In the flavor and fragrance industry, it contributes to the creation of fruity and green notes, enhancing the aroma profiles of products like perfumes, soaps, and food additives. Additionally, it serves as a building block in the production of resins, plasticizers, and other specialty chemicals, where its reactivity is leveraged to form more complex compounds. Its role in organic synthesis also extends to the development of agrochemicals and other industrial applications, making it a versatile component in chemical manufacturing processes.