Used as a preservative in food and beverages to prevent oxidation and maintain freshness, especially in dried fruits, wines, and fruit juices. Helps inhibit microbial growth and preserve color and flavor.

Commonly used in pharmaceuticals to stabilize active ingredients sensitive to oxidation.

Employed in water treatment to remove chlorine and dissolve residual chloramines.

Applied in the textile industry during dyeing processes to control pH and prevent oxidation of dyes.

Also utilized in paper manufacturing and leather processing for bleaching and sulfite pulping.