Poly(4-styrenesulfonic acid-co-maleic acid) sodium salt is widely used as a dispersant in various industrial applications. Its ability to stabilize particles in suspension makes it valuable in the formulation of paints, coatings, and inks, where it helps prevent settling and ensures uniform consistency. In the water treatment industry, it is employed to inhibit scale formation and disperse impurities, improving the efficiency of filtration systems. Additionally, it is utilized in the production of ceramics and construction materials to enhance the workability and stability of slurries. Its polyelectrolyte properties also make it suitable for use in the paper industry as a retention aid and in the textile industry for dyeing processes.