Discover top-quality Sodium Pyrosulfite CAS 7681-57-4 for printing, dyeing, and tanning from Guangzhou Zhifan Chemical Co., Ltd. Your trusted chemical supplier.
Sodium Metabisulfite
Product Description:
Sodium metabisulfite (Na2S2O5) is a white or yellow crystal with a strong pungent smell. It is soluble in water, forming an acidic aqueous solution. When exposed to strong acids, it releases sulfur dioxide and forms corresponding salts. However, prolonged exposure to air leads to oxidation into sodium sulfate, making long-term storage impractical.
Company: Guangzhou Zhifan Chemical Co., Ltd.
| Item |
Food Grade |
Industry Grade |
| Purity ( As Na2S2O5) |
98.0% min |
96.0% min |
| Sulfur Dioxide( SO2) |
65.0% min |
65.0% min |
| Arsenic ( As ) |
0.0002% max |
- |
| Heavy metals ( As Pb ) |
0.0005% max |
- |
| Selenium (Se ) |
0.0005% max |
- |
| Iron (Fe) |
0.001% max |
0.002% max |
| Water insoluble |
0.02% max |
0.05% max |
| PH value : |
4.0-4.8 |
4.0-4.8 |
| Remark : |
Conformed with FCCV and E223 Standard |
Our product is a versatile chemical compound used in various industries:
- Production of insurance powder, sulfamethazine, metamizole, caprolactam
- Purification of ***, phenylpropyl sulfone, and benzaldehyde
- Ingredient in fixatives in the photographic industry
- Production of vanillin in the spice industry
- Preservative in the brewing industry
- Rubber coagulant and dechlorinating agent after cotton cloth bleaching
- Organic intermediate in various processes
- Used in printing, dyeing, and tanning
- Reducing agent in chemical reactions
- Wastewater treatment in electroplating industry, oil fields, and mineral processing
- Preservatives, bleaching agents, and loosening agents in food processing
Choose our product for its wide range of applications and high-quality standards.
Product: Sodium Metabisulfite
Safe Dosage: The recommended dosage of sodium metabisulfite is 10-1000mg/kg to prevent harmful effects on the human body.
Protective Measures: It is essential to wear protective equipment such as gloves, masks, and goggles during operation to avoid direct contact.
Avoid Mixing: Do not mix with foods high in vitamin C or other chemicals to preserve nutritional content.
Storage Conditions: Store in a dry, ventilated, and cool place, away from high temperatures and humidity. Keep sealed to prevent moisture absorption and caking.
Avoid Long-Term Storage: Due to its tendency to deteriorate, long-term storage is not recommended.
Welcome to Guangzhou Zhifan Chemical Co., Ltd.
Our company, with over 15 years of experience in the chemical industry, offers the latest product consultation and market insights. We have 5,000 square meters of chemical warehouses strategically located near Guangzhou Nansha Port and Shenzhen Port for convenient international shipping. With qualifications to handle dangerous goods, our products undergo rigorous quality inspections, providing you with confidence in your purchase.
Main Products:
- Sodium Hydroxide
- Sodium Sulfide
- Polyaluminum Chloride
- Polyacrylamide
- Oxalic Acid
- Compound Alkali
- Sodium Hydrosulfide
- Sodium Metabisulfite
- Ferrous Sulfate
- Soda Ash
- Glucose
- Citric Acid
- Industrial Salt
- Defoaming Agent
Are you a factory or a trader?
We are a trader, but we have cooperative factories that provide stable supply, especially sodium hydroxide and sodium sulfide. We are the exclusive agent in southern China and have certain advantages in channels and prices. At the same time, if you need other chemical products, we can also Finding a suitable factory for you to cooperate with will not limit you to one factory providing a single product.
How to transport?
For chemical products, we generally transport them by sea by full container. If the quantity you purchase does not meet the full container requirements or special products, we will combine them with other goods or pack the special chemicals separately. The packing method can be confirmed after placing the order.
Are the quality of your products stable?
Because we are a trading company, we cooperate with large-scale factories in China. Before cooperating with them, we will purchase samples and inspect the factories. Only products with stable product quality that comply with national regulations can enter ours. In the product list, we will conduct an additional inspection for the exported goods, and any products that do not meet the standards will be rejected by us.
If I purchase a large quantity, can I get any additional discounts?
Regarding large customers, we have more favorable prices, but based on different chemicals, you need to consult customer service to get the latest quotation.
What's your MOQ?
Our minimum order quantity is 1 ton, which is shipped by LCL with other goods (except for special chemicals)
Do you provide free samples?
We do not provide free samples for the time being, because the production methods and quality testing of chemical standards are the same. I can provide you with the quality testing report of our products and other certifications you need to ensure that our quality is the same as high-quality products on the market.
Can I customize my own logo or packaging?
Our products are packaged in 25kg, 50kg and barrels, generally in English packaging and branded in Chinese. If you need other packaging methods, you can contact our customer service. Special packaging requires customization fees.
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