Used primarily in the synthesis of azo dyes, it acts as a coupling agent to produce vibrant and stable colors for textiles and printing inks. It is also employed in the preparation of pharmaceutical intermediates, particularly in the development of drugs with hydrazide functional groups. Additionally, it serves as a chelating agent in analytical chemistry for the detection and quantification of metal ions. Its role in organic synthesis extends to the creation of polymers and resins with enhanced thermal stability and mechanical properties.