Sodium Metabisulfite (Na₂S₂O₅): The Multifaceted Antioxidant and Preservative for Industry Excellence
 
Cat No.: ASC-1041
 
 
Introduction:
Sodium Metabisulfite, chemically denoted as Na₂S₂O₅, is a white, crystalline or powdery solid that possesses a pungent sulfur odor. Highly soluble in water, it serves as a powerful antioxidant, preservative, and reducing agent. Its efficacy and cost-effectiveness make it indispensable in sectors such as food and beverage, water treatment, mining, and photography.
 
Key Features:
Antioxidant Properties: Prevents oxidation by acting as a reducing agent, thereby preserving product quality.
Preservative Function: Inhibits the growth of microorganisms, extending shelf life in food and beverage applications.
Disinfectant Capabilities: Effective in sanitizing equipment and surfaces, especially in brewing and winemaking.
Versatile Applications: Utilized across diverse industries including food processing, water treatment, pulp and paper, textiles, and photography.
High Solubility: Easily dissolves in water, facilitating seamless integration into various processes.
Applications:
1. Food and Beverage Industry
Preservative Agent:
Wine and Beer Production: Used as an antimicrobial and antioxidant to preserve color and flavor.
Dried Fruits and Vegetables: Prevents browning and spoilage by inhibiting enzymatic and non-enzymatic reactions.
Antioxidant Additive:
Juices and Beverages: Maintains freshness and extends shelf life by preventing oxidation.
Bleaching Agent:
Confectionery and Baking: Enhances the appearance of products by lightening coloration.
2. Water Treatment
Chlorine Removal:
Dechlorination of water prior to discharge into the environment, protecting aquatic life.
Wastewater Treatment:
Reduces heavy metals and aids in the removal of excess oxygen.
3. Mining Industry
Cyanide Detoxification:
Employed to neutralize cyanide in gold and silver mining processes, ensuring environmental compliance.
4. Photography
Developing Agent:
Functions as a component in photographic developers and fixers, enhancing image quality.
5. Textile and Pulp & Paper Industry
Bleaching Agent:
Facilitates the bleaching of wool, cotton, and paper pulp, achieving desired whiteness levels.
Technical Specifications:
Parameter
Specification
Appearance
White crystalline powder
Purity (%)
≥ 97.0
pH (5% solution at 20°C)
4.0 – 5.5
Solubility
Highly soluble in water
Iron Content (Fe, ppm)
≤ 20
Heavy Metals (Pb, ppm)
≤ 10
Sulfate Content (%)
≤ 0.05
Benefits:
Cost-Effective Solution: Offers an economical alternative to more expensive preservatives and reducing agents.
Efficiency: Provides rapid and effective results in preventing oxidation and microbial growth.
Regulatory Compliance: Meets industry standards and regulations for use in food and other applications.
Environmental Protection: Assists in water treatment processes, reducing harmful chemicals before discharge.