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Sodium Metabisulfite – Food & Industrial Grade Preservative
Jiangsu Khonor Chemicals Co., Limited supplies high-quality Sodium Metabisulfite (CAS 7681-57-4, Na₂S₂O₅), a versatile preservative, antioxidant, and reducing agent widely used in the food industry, water treatment, and various industrial applications. We offer bulk supply with customized packaging options.
📌 Detailed Introduction of Sodium Metabisulfite
✔ What is Sodium Metabisulfite?
Sodium Metabisulfite, also known as sodium pyrosulfite, is a white crystalline powder with a strong sulfur dioxide odor. It is widely used in the food, pharmaceutical, water treatment, and industrial sectors due to its strong antioxidant and preservative properties.
✔ CAS Number & Chemical Formula:
CAS Number: 7681-57-4
Chemical Formula: Na₂S₂O₅
Molecular Weight: 190.1 g/mol
📌 Product Specifications
| Property | Specification |
|---|---|
| Appearance | White or slightly yellow crystalline powder |
| Purity (Na₂S₂O₅, %) | ≥ 96.5% (Food Grade) / ≥ 97% (Industrial Grade) |
| SO₂ Content (%) | ≥ 65.0% |
| Heavy Metals (Pb, ppm) | ≤ 5 ppm (Food Grade) |
| Arsenic (As, ppm) | ≤ 1 ppm (Food Grade) |
| Iron (Fe, ppm) | ≤ 20 ppm |
| pH (1% solution) | 4.0 – 4.8 |
| Solubility | Soluble in water, insoluble in alcohol |
| Packing | 25kg bags or as per customer requirements |
📌 Applications of Sodium Metabisulfite
✔ Food & Beverage Industry (E223)
Used as a preservative and antioxidant in wine, fruit juices, dried fruits, and seafood.
Prevents browning and oxidation in processed foods.
Controls bacterial growth and extends shelf life.
✔ Water Treatment
Acts as a chlorine remover in wastewater treatment.
Used for dechlorination of drinking water before reverse osmosis.
Helps in removing heavy metals from industrial wastewater.
✔ Industrial Applications
Used as a bleaching agent in pulp, paper, and textile industries.
Applied in leather processing for deliming and removing excess tannins.
Used as a reducing agent in chemical industries.
✔ Pharmaceutical & Medical Applications
Used in pharmaceutical formulations as an antioxidant.
Added in some intravenous (IV) solutions for stability.
✔ Mining & Oil Drilling
Applied in ore flotation and mineral processing.
Used in oil drilling fluids to reduce viscosity and prevent oxidation.
📌 How Does Sodium Metabisulfite Work?
Preservative Action in Food:
Releases sulfur dioxide (SO₂), which inhibits the growth of bacteria, mold, and yeast.
Prevents oxidation of food, keeping colors and flavors intact.
Water Treatment & Dechlorination:
Reacts with residual chlorine in water to neutralize it before reverse osmosis treatment.
Industrial Bleaching & Reducing Agent:
Breaks down unwanted colorants in textiles, paper, and leather processing.
📌 Production Method & Raw Materials
✔ Raw Materials Used:
Sodium carbonate (Na₂CO₃)
Sulfur dioxide (SO₂)
Water (H₂O)
✔ Production Process:
Absorption: Sulfur dioxide is absorbed into a sodium carbonate solution.
Crystallization: The solution is cooled to allow sodium metabisulfite crystals to form.
Filtration & Drying: The crystals are filtered, dried, and packaged.
📌 Famous Sodium Metabisulfite Brands Worldwide
Solvay (Belgium)
Aditya Birla Chemicals (India)
BASF (Germany)
Jiangsu Khonor Chemicals Co., Limited (China)
📌 Why Choose Jiangsu Khonor Chemicals Co., Limited?
✔ High-Purity Food & Industrial Grade Sodium Metabisulfite
✔ GMP & ISO-Certified Manufacturing
✔ Competitive Pricing & Bulk Supply
✔ Custom Packaging & Global Distribution
📌 Order High-Quality Sodium Metabisulfite from Jiangsu Khonor Chemicals Co., Limited!
Looking for a trusted Sodium Metabisulfite supplier? Jiangsu Khonor Chemicals Co., Limited provides bulk supply of premium-grade Sodium Metabisulfite for food, water treatment, and industrial applications.
📞 Contact us today for a free quote & sample!