4-Phenylbutanal is widely used in the fragrance and flavor industry due to its pleasant floral and fruity aroma. It serves as a key ingredient in the formulation of perfumes, colognes, and scented products, adding a sweet and slightly balsamic note. In food flavoring, it enhances the taste of various products, particularly those requiring a fruity or nutty essence. Additionally, it is employed as an intermediate in organic synthesis, contributing to the production of pharmaceuticals and other fine chemicals. Its versatility makes it a valuable component in both sensory and industrial applications.