Alpha-Cyclodextrin (α-CD) (CAS No. 10016-20-3) is a cyclic oligosaccharide composed of six glucose units linked by α-1,4-glycosidic bonds. It has a hydrophobic inner cavity and a hydrophilic outer surface, making it useful for encapsulating hydrophobic molecules. α-CD is widely used in pharmaceuticals, food, cosmetics, and biotechnology for improving solubility, stability, and controlled release of active ingredients. It is water-soluble and has applications in drug delivery, dietary fiber, and functional foods.