Salicylaldehyde hydrazone is primarily used in the field of analytical chemistry as a chelating agent for the detection and determination of metal ions. It forms stable complexes with various metals, making it useful in spectrophotometric analysis to quantify trace amounts of metals in environmental and biological samples. Additionally, it is employed in organic synthesis as an intermediate for the preparation of heterocyclic compounds, which have applications in pharmaceuticals and agrochemicals. Its ability to act as a ligand in coordination chemistry also makes it valuable in the development of metal-organic frameworks (MOFs) and catalysts. Furthermore, it has been explored for its potential use in corrosion inhibition, particularly for protecting metals in industrial settings.