Sodium chlorite is generally used in the following industries:

1. Water treatment: Sodium chlorite is commonly used as a disinfectant and oxidizing agent in water treatment processes to control bacteria, algae, and odors.

2. Pulp and paper industry: Sodium chlorite is used in the bleaching process of pulp and paper to remove color and brighten the final product.

3. Textile industry: Sodium chlorite is used as a bleaching agent for textiles and fabrics to remove stains and improve color uniformity.

4. Food industry: Sodium chlorite is used as a preservative and antimicrobial agent in food processing to control the growth of bacteria and extend the shelf life of food products.

5. Chemical industry: Sodium chlorite is used in the production of chlorine dioxide, which is a versatile oxidizing agent used in various chemical processes, such as in the manufacture of dyes, pharmaceuticals, and explosives.

6. Agriculture: Sodium chlorite is used in agriculture as a disinfectant and fungicide to control plant diseases and improve crop yields.

Overall, sodium chlorite has a wide range of applications in various industries due to its disinfectant, bleaching, and oxidizing properties.