Our company has been adhering to the principle of seeking development through science and technology for many years and is always at the forefront of the Calcium Cyanamide, Cas No. 553-72-0, Potassium Dihydrogen Phosphate industry, which makes our products sell well both at home and abroad. We have professional and technical personnel to quickly answer various technical consultations, respond to your needs, select suitable products for you, and provide reasonable and reliable suggestions. We have been pursuing the market-oriented, science and technology as the guide, quality as the main line, reputation as the life of the enterprise purpose. Our products are widely sold at home and abroad, and we have established long-term and good business relationships with many customers. Our company has developed a set of independent and perfect product optimization design system after years of efforts.
Products Description

| CAS No. | 7681-57-4 |
| Grade | Industrail Grade / Food Grade |
| Molecular Formula | Na₂S₂O₅ |
| Molecular Weight | 190.10 g/mol |
| Appearance | White or slightly yellowish crystalline powder |
| Packaging | 25kg bag, ton bag |
| Storage | Keep tightly closed in a cool, dry place |
Specifcation
| Item | Specification | |
| Purity (Na2S2O5) | Minimum 98.0% |
Minimum 97.0% |
| Sulfur dioxide (SO2) |
Minimum 65.0% |
Minimum 65.0% |
| Arsenic (As) | Max. 0.0002% |
- |
| Heavy metals (e.g. Pb) |
Max 0.0005% |
- |
| Selenium (Se) |
Max 0.0005% |
- |
| Iron (Fe) |
Max 0.001% |
Max 0.002% |
| Insoluble in water |
Max 0.02% |
Max 0.05% |
| PH value |
4.0-4.8 |
4.0-4.8 |
| review | Meets FCC V and E 223 standards | |
Application
Food & beverage industry & water treatment
The product can be used in a number of areas of introduction



Sodium Metabisulfite can be used as a preservative and antioxidant in food grade, which can effectively inhibit the growth of microorganisms and extend the shelf life of food. It can also be used in the beverage industry to effectively sterilize and inhibit the excessive reproduction of miscellaneous bacteria and yeast. Sodium Metabisulfite can be used in the industry for water treatment dechlorination agents and circulating cooling water systems, and can also be used in the textile industry and paper industry
FAQ
Q: What's your MOQ?
A: Usually, our MOQ is 1MT. If the quantity is too small, the sea freight will be higher.Of course, if you have special needs, you can also contact us, we will do our best to satisfy you.
Q: What's your payment terms?
A: We accept T/T or Irrevocable L/C.
Q: Can i get samples?
A: free samples is available,but freight charges will be at your account and the charges will be deducted from your order in the future.
Q: How long is your delivery/lead time?
A: Generally it is 2 weeks if the goods are in stock. Or it is 1-4 weeks if the goods are not in stock, it depents on your quantity.
Q: Can you make packing and logo as customer's request?
A: Yes, we can. Usually, we provide neutral packing, if you need customized packaging or logo, please inform us.
Q: What documents can you provide?
A: Usually, we provide Commercial Invoice, Packing List, Bill of loading, COA, if you have any special requirements in your market, please inform us.
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