Used primarily as a reactive monomer in the synthesis of specialty polymers and copolymers, particularly in water-soluble resins and coatings. Its hydroxyl and carboxylic acid groups allow for crosslinking, enhancing film formation and adhesion properties. Commonly employed in pressure-sensitive adhesives, textile treatments, and as a building block in UV-curable formulations. Also finds use in controlled release systems and hydrogels due to its ability to modify polymer hydrophilicity and reactivity.