Cis-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, plasticizers, and specialty chemicals. In polymer chemistry, it is utilized to create copolymers with specific properties, such as flexibility or resistance to environmental factors. Additionally, cis-3-octene is employed in the synthesis of fragrances and flavoring agents, contributing to the development of complex scents and tastes. Its role in catalytic processes, such as hydrogenation and oxidation, also makes it valuable in the manufacture of fine chemicals and pharmaceuticals.