Sodium 4-vinylbenzenesulfonate is widely used in the production of polymers and copolymers, particularly in the creation of water-soluble or hydrophilic materials. It acts as a monomer in polymerization processes, contributing to the sulfonate group, which enhances the solubility and ionic properties of the resulting polymers. These polymers are often employed in water treatment applications, such as scale inhibition and dispersing agents, due to their ability to interact with metal ions and prevent deposition. Additionally, it is utilized in the synthesis of ion-exchange resins, which are critical in purification and separation processes in various industries, including pharmaceuticals and food processing. The compound also finds use in the development of hydrogels and coatings, where its hydrophilic nature improves moisture retention and adhesion properties.