Spiro[indoline-3,4'-piperidin]-2-one-6-ol hydrochloride is a chemical compound utilized in various applications, particularly in organic synthesis. With a molecular formula of C14H18ClNO2, it features a spirocyclic structure incorporating an indoline, piperidine, and hydroxyl group. This compound is esteemed 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 engaged in the development of complex organic molecules.