Used as an intermediate in the synthesis of dyes and pigments, particularly in the production of azo dyes due to its amino and nitro functional groups that facilitate diazotization and coupling reactions. Also employed in the preparation of pharmaceuticals where the aromatic amine moiety serves as a building block for active ingredients. Its carboxylic acid group allows for easy derivatization, making it useful in organic synthesis for constructing more complex molecules. Additionally, it finds use in research laboratories for developing new compounds in medicinal chemistry and material science. This purified form (≥99% by HPLC) is specifically suitable for biochemical applications, such as serving as a substrate or reagent in enzymatic assays for gamma-glutamyl transferase (γ-GT) activity.