Food Additive 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%
• 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 Sodium Pyrosulfite CAS 7681-57-4 for printing, dyeing, and tanning from Guangzhou Zhifan Chemical Co., Ltd. - your reliable chemical supplier.

Product Description

Sodium Metabisulfite

 

Guangzhou Zhifan Chemical Co., Ltd. presents Sodium Metabisulfite, an inorganic compound available in white or yellow crystals with a potent odor. This compound is water-soluble, resulting in an acidic aqueous solution. Upon contact with a strong acid, it releases sulfur dioxide and forms corresponding salts. However, prolonged exposure to air leads to oxidation into sodium sulfate, necessitating short-term storage.

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

 

Our product is a versatile chemical compound used in various industries:

 

• Production of insurance powder, sulfamethazine, metamizole, caprolactam, etc.


• 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


• Used in printing, dyeing, and tanning


• Reducing agent


• Wastewater treatment in the electroplating industry, oil fields, and mineral processing agents in mines


• Preservatives, bleaching agents, and loosening agents in food processing


 

Contact Guangzhou Zhifan Chemical Co., Ltd. for all your chemical needs!

 

 

Precautions

 

Sodium Metabisulfite

 

Safe Dosage: The recommended dosage of sodium metabisulfite is 10-1000mg/kg to prevent harmful effects on the human body.

 

Protective Measures: Wear protective equipment like gloves, masks, and goggles during operation to avoid direct contact.

 

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

 

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

 

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

 

For more information, please contact Guangzhou Zhifan Chemical Co., Ltd.

 

 

Company Profile

 

Guangzhou Zhifan Chemical Co., Ltd.

 

As procurement and channel specialists with extensive experience in the chemical industry, we offer the latest chemical product consultation and market insights. With over 15 years of focus on the industry, our company provides a wide range of high-quality products including sodium hydroxide, polyaluminum chloride, oxalic acid, and more. Our dedicated chemical warehouses spanning 5,000 square meters in South China ensure convenient access to international shipping via Guangzhou Nansha Port and Shenzhen Port. We are qualified to handle dangerous goods and all our products undergo rigorous quality inspections, backed by inspection reports for your peace of mind.

 

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.

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.