Vinyl 4-phenylbutanoate is primarily used in the production of polymers and copolymers, where it acts as a monomer. Its incorporation into polymer chains enhances the material's flexibility and durability, making it suitable for applications in coatings, adhesives, and sealants. The compound is also utilized in the synthesis of specialty chemicals, particularly in the development of fragrance ingredients, where it contributes to the stability and longevity of scents. Additionally, it finds use in the pharmaceutical industry as an intermediate in the synthesis of active pharmaceutical ingredients (APIs), aiding in the creation of compounds with specific therapeutic properties.