Chlorine dioxide is used to treat cooling towers to control algal growth, bacteria (e.g., Legionella) and eliminate biofilm, which helps to maintain the efficiency of heat exchangers, avoid fouling and prevent corrosion. In most applications, high-purity chlorine dioxide is much less corrosive than chlorine.
High-purity chlorine dioxide is stable and effective across a broad pH range; it is fully compatible with most water treatment chemistry used in industrial cooling water applications.
Before handling any chemical, persons are advised to acquire training in the handling and use of such materials, and to become fully familiar with applicable Material Safety Data Sheets and operating manuals.
In the United States, the use of chlorine dioxide is for many purposes regulated by agencies of the Federal Government, especially: EPA, FDA, OSHA. The transportation of chemicals is regulated by DOT. State and local regulatory agencies may also have jurisdiction. Before chlorine dioxide is used for any purpose, the user should become fully informed about any and all applicable governmental rules, regulations and codes.