SULFUROUS ACID Chemical compatibility with O-rings, rubbers, & plastics

Sulfurous acid (H2SO3) is a weak, unstable acid formed by dissolving sulfur dioxide (SO2) in water. It is used in various industrial and chemical applications, primarily as a reducing agent, bleaching agent, and preservative. In the food industry, sulfurous acid is employed as a preservative for dried fruits, wines, and other food products, preventing spoilage and maintaining freshness. It is also used in the pulp and paper industry for bleaching wood pulp and in water treatment processes for dechlorination. Proper handling and storage of sulfurous acid are essential to prevent accidents and ensure safety, as it can cause respiratory irritation and other health hazards. Safety measures, including the use of appropriate protective equipment and adherence to handling protocols, are crucial when working with sulfurous acid. Its versatility and effectiveness in various applications make sulfurous acid a valuable chemical in numerous industries, although its use requires careful control to prevent hazards.

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