Sodium sulfite anhydrous is widely used in the photography industry as a preservative in developing solutions to prevent oxidation, ensuring the quality and longevity of photographic films and papers. In the food industry, it serves as a preservative and antioxidant, preventing discoloration and spoilage in dried fruits, canned vegetables, and wines. It is also employed in water treatment processes to remove excess chlorine and oxygen, protecting pipes and equipment from corrosion. In the textile industry, it acts as a bleaching agent and helps in the removal of residual chlorine after fabric treatment. Additionally, it is utilized in the pulp and paper industry to maintain the brightness and strength of paper products during production. Its reducing properties make it valuable in various chemical synthesis processes and as a component in some pharmaceutical formulations.