Premium Sodium Pyrosulfite CAS 7681-57-4

• CAS No.: 7681-57-4
• Formula: Na2s2o5
• EINECS: 231-673-0
• Appearance: Powder
• Certification: CCIC, RoHS, ISO
• Purity: 90%~99%
• Model NO.: Sodium Pyrosulfite
• Type: Sodium Pyrosulfite
• Grade Standard: Food Grade
• Transport Package: Bag
• Specification: 25kg
• Trademark: changcheng
• Origin: China
• Production Capacity: 100000ton/Year

Product Description

Discover top-quality Premium Sodium Pyrosulfite CAS 7681-57-4 powder from Guangzhou Zhifan Chemical Co., Ltd. Perfect for printing, dyeing, tanning, and food additives.

Product Description

Sodium Metabisulfite

 

Product Description:

 

Sodium metabisulfite (Na₂S₂O₅) is a white or yellow crystal with a strong pungent smell. This inorganic compound is soluble in water, forming an acidic aqueous solution. When exposed to a strong acid, 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

 

Application Areas

Product Description


 

Welcome to Guangzhou Zhifan Chemical Co., Ltd.

 

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 in textile industry


• Organic intermediate in various processes


• Used in printing, dyeing, and tanning


• Reducing agent in chemical processes


• Wastewater treatment in electroplating, 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.

 

 

 

Sodium Metabisulfite Product Description


 

Welcome to Guangzhou Zhifan Chemical Co., Ltd.

 

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: When handling, wear protective equipment such as gloves, masks, and goggles to avoid direct contact.

 

Avoid Mixing: Do not mix with foods or chemicals high in vitamin C to preserve nutritional content.

 

Storage Conditions: Store in a dry, ventilated, and cool place. Keep sealed to prevent moisture absorption and caking. Avoid high temperature and humidity.

 

Avoid Long-Term Storage: Due to potential deterioration, long-term storage is not recommended.

 

FAQ

 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.

Are your prices the lowest?
Maybe the price you see on the product interface is fixed and different from other companies. However, the prices of products in the chemical industry will change frequently. We can only say that we can provide you with high-quality supply as much as possible. Lowering the price, of course, is also related to the quantity you purchase. You can consult customer service for the latest product prices.

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.

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.