Poly(acrylic acid) is widely used as a thickening agent in various industries, including cosmetics and personal care products, where it enhances the viscosity of lotions, creams, and gels. In the pharmaceutical sector, it serves as a binder in tablet formulations, ensuring the active ingredients are held together effectively.

In water treatment, poly(acrylic acid) acts as a dispersant, preventing the formation of scale and improving the efficiency of filtration systems. It is also employed in the production of superabsorbent polymers, which are essential components in hygiene products like diapers and sanitary napkins due to their ability to absorb and retain large amounts of liquid.

Additionally, poly(acrylic acid) is used in the textile industry as a sizing agent, providing fibers with improved strength and smoothness. In agriculture, it is utilized in soil conditioning to enhance water retention and promote healthier plant growth. Its versatility and functionality make it a valuable material across multiple applications.