Used as a reactive intermediate in polymer synthesis, itaconic anhydride is valued for introducing carboxylic acid functionality into resins and coatings. It enhances adhesion, thermal stability, and crosslinking in acrylic and epoxy systems. Commonly applied in waterborne dispersions for eco-friendly paints and adhesives due to its ability to improve dispersion stability and film formation. Also utilized in textile treatments to increase dye affinity and in superabsorbent polymers for its pH-responsive behavior. Its biobased origin makes it suitable for sustainable material development.