Used primarily as an intermediate in organic synthesis, especially in the production of dyes and pharmaceuticals. It plays a key role in the development of functional materials such as photochromic compounds, which are used in lenses that darken upon exposure to UV light. Its structure supports the creation of indoline-based derivatives with applications in medicinal chemistry, including potential use in drug candidates targeting neurological and inflammatory conditions. Additionally, it serves as a building block in the synthesis of advanced heterocyclic systems for research and industrial applications.