Used as a preservative in pharmaceuticals and food products to prevent oxidation and spoilage by removing dissolved oxygen from solutions. Commonly employed in wine and beverage production to maintain freshness and color stability. Acts as an antioxidant in photographic processing, protecting developing solutions from aerial oxidation. Utilized in water treatment to dechlorinate drinking water and wastewater by neutralizing residual chlorine. Serves as a reducing agent in chemical manufacturing processes, including the production of dyes, paper pulping, and textile processing. Also applied in analytical chemistry for the determination of oxygen content in samples.