6-Chloro-3,4-dihydro-2H-benzo[b][1,4]oxazine hydrochloride is a chemical compound utilized in various applications, particularly in organic synthesis. With a molecular formula of C8H9Cl2NO, it features a benzo[b][1,4]oxazine ring substituted with a chlorine atom and a hydrochloride group. This compound is valued for its versatility and utility in diverse chemical reactions, serving as a building block in the synthesis of pharmaceuticals, agrochemicals, and functional materials. Its high purity and stability make it a preferred choice for researchers and chemists involved in the development of complex organic molecules.