Oxalyldihydrazide is widely used as a cross-linking agent in polymer chemistry, particularly in the production of resins and adhesives. It enhances the thermal stability and mechanical properties of materials, making it valuable in coatings and films. In the textile industry, it serves as a flame retardant, improving the safety of fabrics. It is also an important intermediate in the chemical industry for the synthesis of other chemicals, such as heterocyclic compounds. Additionally, it is employed in analytical chemistry as a reagent for the detection and quantification of metal ions, such as copper and nickel, due to its chelating properties. Its ability to form stable complexes also makes it useful in water treatment processes for removing heavy metals.