Used primarily as a dye intermediate in the production of hair dyes and textile dyes, it helps in creating deep, long-lasting color shades. It is also employed in the manufacturing of certain polymers and resins, where it acts as a curing agent or cross-linking agent, enhancing the durability and stability of the final product. In analytical chemistry, it serves as a reagent for detecting specific compounds due to its ability to form colored complexes. Additionally, it finds application in organic synthesis as a building block for various chemical reactions.