Indolin-5-ol is primarily utilized in the synthesis of various pharmaceutical compounds. It serves as a key intermediate in the production of drugs targeting neurological disorders, including Parkinson's disease and depression. Its structure is also valuable in the development of anticancer agents, where it contributes to the creation of molecules that inhibit tumor growth. Additionally, Indolin-5-ol is employed in the research and development of novel therapeutic agents due to its potential in modulating biological pathways. Its applications extend to organic synthesis, where it is used to construct complex molecules for medicinal chemistry and drug discovery.