4-n-Octylstyrene is primarily used as a monomer in the production of specialty polymers and copolymers. Its unique structure, combining a styrene group with an octyl chain, imparts specific properties to the resulting materials, such as enhanced hydrophobicity and flexibility. These polymers are often utilized in coatings and adhesives, where they provide improved water resistance and durability. Additionally, the compound is employed in the synthesis of surfactants and emulsifiers, which are critical in formulations for personal care products and industrial applications. Its ability to modify surface properties makes it valuable in creating materials with tailored characteristics for specific uses.