Trans-3-octene is primarily used in organic synthesis and industrial applications. It serves as a key intermediate in the production of various chemicals, including polymers, plastics, and specialty materials. Its structure makes it valuable in catalytic processes, such as polymerization and copolymerization, where it contributes to the creation of materials with specific properties like flexibility and durability. Additionally, trans-3-octene is utilized in the development of fragrances and flavors, where its unique chemical structure enhances the complexity of aromatic compounds. It also plays a role in research and development, particularly in studying reaction mechanisms and developing new synthetic pathways in organic chemistry.