Used as a corrosion inhibitor, particularly in cooling water systems and metalworking fluids, where it helps protect copper and copper alloy surfaces from oxidation and degradation. It is also employed in some industrial formulations to stabilize metal components against environmental stress. Additionally, it serves as an intermediate in the synthesis of certain agrochemicals and pharmaceuticals due to its reactive benzotriazole core. Its chlorinated structure enhances reactivity in coupling reactions, making it useful in organic synthesis and materials science applications.