Sodium pyrosulfite
Chemical formula Na2S2O5
Molecular weight 190.09
CAS logon number 7681-57-4
EINECS logon number 231-673-0
Melting point >300 degree
Water-soluble soluble
Density 1.48
Appearance white powder
Applied antioxidants 

sodium pyrosulfite is white or yellow crystalline powder or small crystal, with a strong smell of SO2, the proportion of 1.4, soluble in water, acidic aqueous solution, contact with strong acids released SO2 and generates the corresponding salts, long in the air, is oxidized to Na2S2O6, so the product can not be stored for a long time. Higher than 150 degrees Celsius, that is, decomposition of SO2.

Main use
chemical industry
For the production of sodium hydrosulfite, sulfamethazine analgin, and chloroform purification of caprolactam, phenprofone and benzaldehyde. Photographic industry; used as a fixative. The spice industry for the production of vanillin. As the brewing industry preservatives, rubber and cotton coagulant after bleaching dechlorination agent. Organic intermediates, dyes, tanning agents used as reducing agents, used in electroplating, oil field wastewater treatment, and as ore dressing agents for mines.
Industry
Used in printing and dyeing, organic synthesis, printing, tanning, pharmaceutical and other departments; in food processing as preservatives, bleaching agents, loose agents.
Used as a chemical reagent
(dyeing and photography), used as a bleaching agent mordant, reducing agent of rubber coagulant, is also used for organic synthesis of pharmaceutical and perfume etc..

Packaging:

1.Packing specification:

10KG/ package,20KG/ package,25KG/ package,40KG/ package,50KG/ package,25 kg / barrel,50 kg / barrel,170 kg / barre,200 kg / barrel etc....

2.Part of the product packaging can be changed according to customer needs

Shipment:

1. As for the tiny amount(less than 50kgs), we will use express(TNT, FedEx, EMS or DHL etc), which is convenient.

2. As for the small amount (from 50kgs to 1000kgs), we will deliver by air or by sea.

3. As for the normal amount (more than 1000kgs), we usually shipped by sea. 

We are hoping to cooperate with partners in global market to creat win-win business.

 If you are interested in our products, Any more inquires, please let us know., best price and free samples will be sent to you right away! Thank you very much!

* Instant reply and 24 hour online.

* Offer free samples, you only need to pay the freight.

* Check and confirm delivery.

Guangzhou billion peak Chemical Technology Co., Ltd., founded in 2007, company headquarters is located in the South Gate of China - Guangzhou, is located in the heart of the economic development of the Pearl River Delta region, trade convenience and fast, it is choice for energy and chemical suppliers.

"Science and technology businesses, faith-based", over the years, billion peak always adhere to the "pursuit of excellence, advocating innovation, integrity management, common development" business philosophy, advocating "equality and mutual benefit, mutual development" of the spirit of contract, with "diversified products, the best price" service won the majority of customers trust and support.

 At present, the company products have included: aluminum hydroxide, alumina, calcium carbonate, calcium carbonate, talc powder, aluminum silicate, calcium carbonate, magnesium silicate, zinc stearate, calcium stearate, magnesium stearate, stearic acid 1801, stearic acid 1806, stearic acid 1810, Zinc Oxide, matting powder, matte powder, titanium white, lithopone, attapulgite clay, white clay, Huang Taotu, high clay powder, washing / calcined kaolin, senior barium sulfate, active calcium carbonate, mica powder, calcium carbonate, magnesium powder, light Magnesium Oxide, diatomite, glass powder, polishing powder, silica powder etc.. Other products are still in R & D update......

Q1: What is the minimum order?

A1: There is no limit, according to your requirements.

Q2: How can I place order?

A2: You can contact us by email about your order details, or place order online.

Q3: How can I pay for you?

A3: After you confirm our PI, we will request you to pay. T/T or L/C is the most usual ways we are using.

Q4: What's your delivery time?

A4: Usually we will arrange the shipment within 10 to 15 days.

Q5: Can your company provide OEM service?

A5: Yes,we can.

Q6: How about the packing?

A6: Usually we provide the packing as 25/50 kg/package,if you have special requirements on them, we will according to you.

Q7: What is loading port?

A7: Whampoa port