Best Price Sodium Sulfite/Na2so3 CAS 7757-83-7

• Customization: Available
• CAS No.: 7757-83-7
• Formula: Na2so3
• Model NO.: Na2SO3
• EINECS: 231-821-4
• Type: Na
• Nutritional Value: Non-nutritional Type
• Effect: Stabilization
• Resource: Natural
• Grade: Food Grade
• Delivery Time: 7-15days
• Colour: White
• Sample: Available
• Uses: Food Additive
• Appearance: Powder
• Usage: Food Additive
• Package: 25kg/Bag,1000kg/Bag,1350kg/Bag
• Assay: 96%,97%,98%
• Transport Package: 25kg/Bag, 1000kg/Bag,
• Specification: 25kg/Bag, 1000kg/Bag,
• Trademark: NO
• Origin: China
• Production Capacity: 300000mt/Year

Product Description

Product Description

  

Chemical formula: Na2SO3

 

Molecular weight: 126.043

 

CAS NO. : 7757-83-7

 

EINECS NO. : 231-821-4

Appearance and properties: white crystalline powder

 

Density: 2.63 g/cm3

 

Refractive index: 1.484

 

Solubility: Easily soluble in water

Sodium sulfite is a kind of inorganic substance, chemical formula Na2SO3, common sulfite. It can irritate eyes, skin and mucous membranes and pollute water sources. High thermal decomposition produces toxic sulphide smoke. In industry, it is mainly used for making cellulose sulfite ester, sodium thiosulfate, organic chemicals, bleached fabrics, etc., and also used as reducing agent, preservative, dechlorination agent, etc
 

Product Specification

Sodium Sulfite

Component	Industrial Grade	Food Grade	High Purity Grade
Appearance	White or yellowish crystalline powder
Assay(Na2S2O5 )	96.5%min	97%min	98%min
water insoluble matter	0.05%max	0.03%max	0.02%max
Iron content(Fe)	0.005%max	0.003%max	0.002%max
(As)	0.0001%max	0.0001%max	0.0001%max
Pb	0.0005%max	0.0005%max	0.0003%max

Component

Industrial Grade

Food Grade

 

 

 

Product Application

 

1. Used for trace analysis and determination of tellurium and niobium, as well as preparation of developer solutions, and also as a reducing agent;
2. Used as a stabilizer for artificial fibers, fabric bleach, photographic developer, dyeing and bleaching deoxidizer, flavoring and dye reducing agent, papermaking lignin remover, etc;
3. Used as a common analytical reagent and photosensitive resistor material;
4. Reducing bleach has a bleaching effect on food and a strong inhibitory effect on oxidase in plant-based foods. According to Chinese regulations, it can be used for preserves with a maximum usage of 2.0g/kg; It can also be used for glucose, liquid glucose, sugar, rock sugar, malt sugar, candy, bamboo shoots, mushrooms and canned mushrooms, grapes, blackcurrant concentrate, with a maximum usage of 0.60g/kg. The residual amount (calculated as SO2) of bamboo shoots, mushrooms, canned mushrooms, preserved fruits, grapes, and concentrated black currant juice is ≤ 0.05g/kg; 
5. The printing and dyeing industry, as a deoxidizer and bleach, is used for the cooking of various cotton fabrics, which can prevent local oxidation of cotton fibers and affect fiber strength, and improve the whiteness of the cooked fabric. The photosensitive industry is used as a developer. Organic industry is used as a reducing agent in the production of meta phenylenediamine, 2,5-dichloropyrazolone, anthraquinone 1-sulfonic acid, 1-aminoanthraquinone etc., which can prevent the oxidation of semi-finished products during the reaction process. Used as a lignin removal agent in the papermaking industry. The textile industry is used as a stabilizer for artificial fibers. The electronic industry is used to manufacture photoresistors. The water treatment industry is used for the treatment of electroplating wastewater and drinking water;
6. Used in the food industry as bleaching agents, preservatives, loosening agents, and antioxidants. Also used in pharmaceutical synthesis and as a reducing agent in the production of dehydrated vegetables;
7. Used in the production of cellulose sulfite esters, sodium thiosulfate, organic chemicals, bleached fabrics, etc., as well as reducing agents, preservatives, dechlorinating agents, etc;

Packaging & Shipping

 

Package:25kg/bag,1000kg/bag,
Shipping marks can be customized according to customer requirements

Company Profile

Dalian Huayang Machinery and Chemistry Co., Ltd. has been engaged in the chemical industry for more than 12 years. We are leading chemical enterprise engaged in the research, development, production and sale of chemicals. With a rich product portfolio and strong technical strength, our company has established business relations with more than 130 countries across Asia, Europe and Africa. Huayang Chemistry Trade Company is a leading chemical enterprise engaged in the research, development, production and sale of chemicals. With a rich product portfolio and strong technical strength, our company has established business relations with more than 130 countries across Asia, Europe and Africa.

FAQ

Q: Are you a factory or a trading company?
A: We are a trading company, but we have worked with many factories for many years. The prices are very competitive.

Q: How do I order?
A: Make an inquiry to us → customize drawing and sample → Inform us of use scenario → Receive our product design recommendation → Discuss details → Confirm sample → sign contract/deposit → Mass production → Goods ready → Balance/delivery → Further cooperation.

Q: What about the sample order?
A: I can give you the sample. Please contact us for details. Once we charge you the sample fee, rest assured that it will be refunded when you place your official order.

Q: Which modes of transportation are available?
A: Sea, air, land, express, special line. Can meet your any need.

Q: How long does it take for delivery [production] and shipment?
A: The delivery time depends on the quantity you order. It usually takes 7-15 working days.

Q: I'm missing some products in my package. What can I do?
A: Please contact our support team, we will confirm the contents of your order with packaging, compensation according to the actual situation, we apologize for the inconvenience.

Q: How do I confirm payment?
A: We accept wire transfer, paypal payment, other payment methods are also acceptable, please contact us before you pay through other payment methods. Another 30% down payment is feasible and the balance should be paid before shipment.

 

Contact us