Used as an intermediate in the synthesis of dyes and pigments, particularly in the production of azo dyes which are widely applied in the textile industry for coloring fabrics. Also serves as a building block in the preparation of certain pharmaceuticals and agrochemicals due to its aromatic amine functionality. Its hydroiodide salt form enhances stability and handling in industrial processes. Employed in research settings for developing light-sensitive materials and in the formulation of specialty chemicals requiring controlled reactivity.