Alpha-D-Galacturonic acid hydrate is widely used in the food industry as a key component in the production of pectin, a gelling agent essential for making jams, jellies, and marmalades. In biotechnology, it serves as a substrate for enzymes like pectinases, which are crucial for clarifying fruit juices and improving their quality. Additionally, it plays a role in the pharmaceutical sector, where it is utilized in the synthesis of polysaccharides for drug delivery systems. Its applications also extend to research, particularly in studies related to plant cell wall structure and function, aiding in the understanding of plant biology and development.