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Sodium Sulfite Merck CAS 7757-83-7

Molecular Formula: Na2O3S

Formula Weight: 126.04

ZSpharmac: Sodium Sulfite Merck Supplement

Product Name: Sodium Sulfite Merck
CAS No: 7757-83-7
Purity: 99%

Basic Info

Product Name:Sodium Sulfite Merck
Other Names:Sodium Sulfite
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Organic Chemical Raw Materials
Appearance:White to Slightly Yellow Solid
EINECS No.:231-821-4
Storage:Store at +5°C to +30°C.
Provide:Sodium Sulfite Merck MSDS;
Sodium Sulfite Merck COA

What is Sodium Sulfite Merck?

Sodium Sulfite Merck is an inorganic compound. It is a white granular powder at room temperature with a sulfur dioxide odor, stable when dry and sensitive to moisture. Soluble in water and glycerol, insoluble in ethanol, the aqueous solution is alkaline, its aqueous solution is alkaline to litmus paper and phenolphthalein, and it reacts with acid to produce toxic sulfur dioxide gas, the pH of 1% aqueous solution is 8.3~9.4, with strong reduction sex. In nature, it exists in three forms: anhydrous Sodium Sulfite Merck, sodium sulfite heptahydrate and sodium sulfite decahydrate, among which anhydrous Sodium Sulfite MerckV is the least easily oxidized.

Sodium Sulfite Merck Properties:

Melting point 500 °C
density 2.63
refractive index 1,484
storage temp. Store at +5°C to +30°C.
solubility H2O: 1 M at 20 °C, clear, colorless
form Solid
Specific Gravity2.633
color White to slightly yellow
PH9.0-10.5 (25℃, 1M in H2O)
PH Range9.0 – 10.5 at 126 g/l at 25 °C
Water Solubility 23 g/100 mL (20 ºC)


Sodium Sulfite Merck Uses

  1. Sodium Sulfite Merck is utilized in rayon stabilizer, material lightening agent, photo programmer, dyeing as well as bleaching deoxidizer, fragrance and also color reducing agent, lignin eliminating agent for papermaking, etc.
  2. Sodium Sulfite Merck is a decreasing bleaching agent that has a whitening result on food and also a solid repressive impact on oxidase in plant foods. According to my nation’s laws, it can be utilized for sweet fruit, and also the optimum usage amount is 2.0 g/kg; it can also be used for sugar, fluid glucose, table sugar, rock sugar, sugar, sweet, bamboo fires, mushrooms and also tinned mushrooms, grapes, blackcurrant juice, and the optimum usage amount is 0.60 g/ kg. Residues of bamboo fires, mushrooms and also tinned mushrooms, preserves, grapes and also blackcurrant juice concentrate (determined as SO2)≤ 0.05 g/kg; potato starch residues ≤ 0.03 g/kg; residues of biscuits, sugar, vermicelli as well as other varieties The amount is less than 0.1 g/kg; the recurring quantity of liquid sugar shall not go beyond 0.2 g/kg.
  3. Salt Sulfite Merck is made use of as basic logical reagent as well as photoresistive material.
  4. Sodium Sulfite Merck is utilized for the microanalytical determination of tellurium and niobium and also the formulation of developing remedies, and also as a lowering agent.
  5. Salt Sulfite Merck printing and also coloring industry is utilized as deoxidizer and also lightening representative for searching of various cotton fabrics, which can prevent local oxidation of cotton fibers and influence fiber stamina, as well as improve the brightness of scouring products. The photosensitive industry is used as a designer. In the organic market, it is used as a reducing representative in the manufacturing of m-phenylenediamine, 2,5-dichloropyrazolone, anthraquinone-1-sulfonic acid, 1-aminoanthraquinone, salt aminosalicylate, etc, which can protect against semi-finished items throughout the reaction process. Oxidation. The paper sector is made use of as a lignin remover. The fabric sector is made use of as a stabilizer for synthetic fibers. The electronic devices market is utilized to make photoresistors. The water treatment sector is made use of for the treatment of electroplating wastewater as well as alcohol consumption water.
  6. Salt Sulfite Merck is additionally utilized in pharmaceutical synthesis. Used as a decreasing representative in the manufacturing of dried veggies.
  7. Sodium Sulfite Merck is utilized to make cellulose sulfite, sodium thiosulfate, natural chemicals, blonde fabrics, and so on. It is likewise utilized as a minimizing representative, preservative, dechlorination representative, and so on.

Sodium Sulfite Merck Production Process

1. After the sulphur is melted, made clear as well as filtered with high efficiency, it is added to the sulphur burner by the sulphur pump.
2. After the air is compressed, dried out as well as detoxified, it is travelled through the sulfur burner, and is incinerated with sulfur to produce SO2 gas (heater gas).
3. The heating system gas is cooled as well as recovered by the waste central heating boiler, and afterwards enters the desulfurization activator to remove the sublimated sulfur in the gas to obtain pure SO 2 material of 20.5% (quantity) gas, which goes into the absorption tower.
4. Soda ash is made into a particular focus of lye, and reacts with sulfur dioxide gas to acquire sodium bisulfite solution.
5. The Salt Sulfite Merck is counteracted with caustic soda to get a salt Salt Sulfite Merck.
6. The Salt Sulfite Merck remedy goes into the concentrator as well as takes on a double-effect continual concentration process. The water was vaporized to acquire a suspension consisting of Salt Sulfite Merck crystals.
7. Place the competent materials of the concentrator right into the centrifuge to achieve solid-liquid separation, and also the solid (wet item sodium sulfite) goes into the air dryer, and also the finished product is gotten by hot air drying out.

Sodium Sulfite Merck Reaction

Sodium Sulfite Merck is a poisonous substance, and it is generally packed in double-layered plastic bags lined with plastic bags and outer plastic woven bags.
Sodium Sulfite Merck is added to the water, which reacts with the dissolved oxygen in the water to form sodium sulfate. Its reaction formula is:
Usually the amount used is 10 times that of dissolved oxygen. At normal temperatures, the reaction is slow and a catalyst, such as Co2+ or Cu2+, needs to be added. Since oxygen scavengers tend to react with organic corrosion inhibitors, chlorine, and quaternary ammonium bactericides, the dosing points of oxygen scavengers should be placed upstream of these dosing points. Sodium Sulfite Merck deoxygenation has the characteristics of cheap price, less investment in deoxygenation and simple operation. However, the main problems that are difficult to overcome are: the dosage and dosage cycle are not easy to grasp, and the deoxidizing effect is unstable; after the Sodium Sulfite Merck is added, the salt content of the pot water is increased, which has a certain impact on the water quality and leads to an increase in sewage discharge. Sodium Sulfite Merck deoxygenation is only suitable for non-tube rack pressure hot water boilers and atmospheric pressure hot water boilers with rated power not greater than 4.2MPa, and for steam and water with rated evaporation not greater than 2t/h and pressure not greater than 1.0MPa. Steam boilers or steam-water boilers with no special quality requirements.
In addition, Sodium Sulfite Merck can also be used as a dechlorination agent for municipal water or industrial water; a raw material stabilizer for the production of sodium thiosulfate; a reducing agent for perfumes, dyes, etc.

Company Profile and Corporate Culture

Company Profile:

ZhiShang Chemical is owned by ZhiShang Group is a professional new-type chemicals enterprise combined into research and development, production and sales .

The company’s competitive product is pharmaceutical raw materials and intermediates (especially carbohydrate derivatives Series), In recent years, the company has made a major breakthrough in food and feed additives, plant extraction, industrial chemicals industry .

The company insists on the spirit of “sincere management, strict quality control, customer as god” , get consistent high praise from customers at home and abroad.

Corporate Culture:

Our Mission
Help China Chemicals to benefit the happiness of human life
Our Vission
Become the most trusted chemical supplier in the world
Our Business Philosophy
Striver – oriented, enrich employees, customer first, deep service, seek development
Our Values
Be prepared for danger in times of peace, forge ahead actively, unity and cooperation, and be brave to fight

About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Additive , Chemical Auxiliary & Catalyst , Organic Chemicals
  • Products/Service: Organic Intermediate,Inorganic Chemistry, APIs, Dyestuffs And Pigments, Fragrance And Spices, Food Additives
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.


Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.


After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.


Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.



You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.


1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.

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