5-Bromo-1H-benzotriazole is primarily used as a corrosion inhibitor in industrial applications, particularly in cooling water systems and metalworking fluids. It effectively protects metals such as copper and its alloys from corrosion by forming a protective layer on the surface. Additionally, it is employed as a stabilizer in photographic developers and as an intermediate in the synthesis of various organic compounds, including pharmaceuticals and agrochemicals. Its ability to absorb UV light also makes it useful in UV stabilizers for plastics and coatings, enhancing their durability and performance under sunlight exposure.