Used as an intermediate in the synthesis of heterocyclic compounds, particularly in the preparation of phenothiazines, which are important in pharmaceuticals for their antipsychotic and antihistaminic properties. It also serves as a building block in organic synthesis for developing bioactive molecules and functional materials. Its structure allows for chelation with metal ions, making it useful in coordination chemistry and catalyst design. Additionally, it has been explored in the development of fluorescent probes and sensors due to its ability to undergo intramolecular charge transfer.