Potassium Metabisulfite (CAS No.: 16731-55-8) is a high-purity, versatile chemical compound widely recognized as a premium preservative, antioxidant, and food additive. With exceptional stability and efficacy, it meets international quality standards (e.g., FCC, BP, USP, GB) and caters to diverse industrial needs across food, pharmaceutical, beverage, and water treatment sectors.
Physically, Potassium Metabisulfite appears as a white crystalline powder or granular solid, odorless or with a slight sulfurous aroma. It is highly soluble in water, moderately soluble in glycerol, and insoluble in ethanol, making it easy to integrate into aqueous formulations. As a powerful reducing agent, it effectively inhibits oxidation, prevents microbial growth, and preserves the color, flavor, and quality of end products—all while complying with strict safety regulations for food and pharmaceutical use.
Our Potassium Metabisulfite is manufactured through advanced purification processes, ensuring low heavy metal content, high active ingredient concentration, and consistent performance. It is a cost-effective solution for manufacturers seeking reliable preservation and oxidation control, trusted by global clients for its quality and versatility.
Beverage Industry
Essential for wine, beer, fruit juices, and soft drinks. It acts as a sterilizer (inhibits yeast and bacteria during fermentation), antioxidant (preserves color and flavor), and sulfiting agent (adjusts pH and prevents spoilage).
Other Applications
used for photographic developer configuration. Acts as a bleaching agent in textile and paper manufacturing, and a preservative in cosmetic formulations.
| Test item | Unit | Specification | Test method |
|---|---|---|---|
| K2S2O5 | g/100g | ≥97.2 | Acc.Fcc IV p.322 |
| SO2 | g/100g | ≥56.0 | Confirm |
| K2S2O3 | g/100g | ≦ 0.1 | ISO 3629-1996(E) |
| Na | g/100g | ≦ 2 | AAS |
| Cl | g/kg | ≦ 0.5 | IC |
| pH值（10%溶液) | – | 3.8-4.8 | RCA/Q-S-066 |
| 重金属（以 Pb计） | mg/kg | ≦10 | AAS |
| As | mg/kg | ≦ 1 | AAS |
| Cu | mg/kg | ≦1 | ICP-AES |
| Fe | mg/kg | ≦5 | ICP-AES |
| Hg | mg/kg | ≦0.1 | AAS(cold vapour) |
| Pb | mg/kg | ≦1 | ICP-AES |
| Se | mg/kg | ≦1 | AAS |
| Zn | mg/kg | ≦ 1 | ICP-AES |
Q: Is Potassium Metabisulfite safe for use in food and beverages?
A: Yes. When used in accordance with recommended dosage limits (e.g., FDA, EU regulations), our Food Grade Potassium Metabisulfite is safe for human consumption. It is a globally recognized food additive with a long history of safe use in preservation and oxidation control.
Q: What grades of Potassium Metabisulfite do you supply?
A: We offer three core grades to meet diverse industrial requirements: Food Grade (for food/beverage preservation), Pharma Grade (for pharmaceutical formulations), and Industrial Grade (for water treatment, textiles, etc.). All grades comply with corresponding international standards to ensure safety and efficacy.
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