Sodium Metabisulfite

Sodium metabisulfite is a white, crystalline powder with a strong sulfur odor. It is commonly used as a preservative and antioxidant in various industries, including food and beverage, pharmaceuticals, and water treatment. Sodium metabisulfite has strong reducing properties and can effectively inhibit the growth of microorganisms, prevent oxidation, and prolong the shelf life of products. In water treatment, it is utilized as a disinfectant and dechlorination agent, effectively neutralizing excess chlorine in water. It also aids in removing certain metals and impurities from water. However, caution should be exercised when handling sodium metabisulfite, as it can release sulfur dioxide gas, which can cause respiratory irritation in high concentrations. Its general characteristics are:

  • Chemical Formula: Na2S2O5
  • Physical State: White crystalline powder
  • Odor: Strong sulfur odor
  • Solubility: Soluble in water
  • pH: Acidic substance with a pH below 7 in solution
  • Density: Approximately 1.48 g/cm³
  • Melting Point: Decomposes above 150 °C (302 °F)

Sodium Metabisulfite Uses in Water Treatment

Sodium metabisulfite finds several uses in water treatment processes due to its beneficial properties. It is primarily employed as a dechlorination agent, effectively neutralizing excess chlorine in water, particularly in applications such as wastewater treatment and swimming pool maintenance. Sodium metabisulfite helps to eliminate chlorine residuals that could be harmful to aquatic life or cause undesirable effects in downstream processes. Additionally, it serves as a reducing agent and antioxidant, assisting in the removal of dissolved oxygen and preventing oxidation in water systems. This property is particularly useful in controlling corrosion and extending the lifespan of pipes and equipment. However, it is important to carefully regulate the dosage of sodium metabisulfite to achieve desired outcomes without causing excessive sulfite levels. Order sodium metabisulfite from Water Solutions Unlimited.

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