Used primarily in the synthesis of dyes and pigments, particularly in the production of colorants for textiles, plastics, and inks. It serves as a key intermediate in the development of indoline-based dyes, which are valued for their vibrant colors and stability. Additionally, it finds application in organic synthesis for creating complex molecules in pharmaceutical research, particularly in the development of compounds with potential biological activity. Its role in the production of photochromic materials is also notable, contributing to the creation of lenses and coatings that adapt to light conditions.