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Sodium Metabisulphite
Sodium Metabisulphite is a versatile and highly efficient reducing agent. In the concrete admixture industry, it acts as a crucial chain transfer agent and reducing initiator during Polycarboxylate Ether (PCE) synthesis to regulate polymer performance. Additionally, it is widely utilized as a highly effective flotation depressant in mining and mineral processing, and as an antichlor in water treatment and textile applications.
Productg Description
Appearance:
White or light yellow crystalline powder.
Specifications (Industrial Grade):
| Item | Technical Standard |
| Purity / Main Content (Na₂S₂O₅) | ≥96.5% |
| Sulfur Dioxide (SO₂) | ≥65.0% |
| Water Insoluble Matter | ≤0.05% |
| Iron (Fe) | ≤0.003% |
| pH Value (5% aqueous solution) | 4.4 – 4.6 |
Applications:
Concrete Admixture Industry: Acts as a specialized functional additive blended with Polycarboxylate Ether (PCE) superplasticizers. It works synergistically to stabilize the admixture formulation, prevent oxidation, and effectively reduce harmful hexavalent chromium (Cr⁶⁺) in cement, thereby enhancing overall concrete performance.
Mining & Mineral Processing: Serves as an essential flotation depressant for sulfide minerals (such as sphalerite and pyrite) in ore beneficiation, and is utilized for cyanide destruction in gold mining effluent.
Water Treatment: Widely used as a highly effective reducing agent to neutralize free chlorine in reverse osmosis (RO) systems, and to reduce toxic hexavalent chromium (Cr⁶⁺) to harmless trivalent chromium (Cr³⁺) in electroplating wastewater.
Textile & Leather Industry: Applied as an antichlor to safely remove excess chlorine after bleaching processes, and as a reducing agent in leather tanning.
Safety & Handling:
Precautions: This product can release toxic sulfur dioxide (SO₂) gas when exposed to moisture or strong acids. Avoid inhalation of dust and contact with skin or eyes. Always wear appropriate personal protective equipment (PPE) during handling.
Packaging & Storage:
Standard Packaging: 25kg PP woven bags with PE inner liner, or 1000kg Jumbo bags.
Storage Recommendations: Store in a cool, dry, and well-ventilated warehouse. Strictly protect from moisture and heat. Keep away from oxidizing agents and strong acids.
Shelf Life: 12 months (under proper tightly sealed storage conditions).
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We leverage advanced molecular design to optimize the workability and durability of concrete. Our polycarboxylate-based solutions are engineered to reduce water usage significantly while maintaining excellent slump retention, even in the most challenging climates and complex mix designs
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