NaClO2, or sodium chlorite, is a chemical compound composed of sodium, chlorine, and oxygen. It appears as a white or yellowish powder and is commonly used as a bleaching agent and disinfectant. Sodium chlorite is often utilized in water treatment processes to purify drinking water and eliminate harmful microorganisms. In addition to its use in water treatment, NaClO2 is also employed in various industrial applications, including the production of chlorine dioxide, a powerful oxidizing agent. It is important to handle sodium chlorite with care, as it can be hazardous in concentrated forms and may pose health risks if ingested or improperly managed.