Sodium chlorite

Sodium chlorite


  • CAS Number: 7758-19-2
  • Appearance: Solid
  • Purity:%
  • Made in: China 
  • Phone Num : +86-2150591759    
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  • Description


Sodium chlorite is a strong oxidizing compound that has a white solid appearance. This chemical is available in both dry and hydrated forms, usually, the hydrated type is more stable. NaClO2 is the chemical formula of this chemical.

Sodium chlorite is used in a variety of industries, including water or wastewater, or the textile industry. For example, it can be used as a surface cleaner to kill bacteria and contaminants. The main use of this material is to produce chlorine dioxide to whiten fabrics, pulps, and paper.

It is also used to disinfect in water treatment after conversion to chlorine dioxide. In the following, we will get more acquainted with the physical and chemical properties and various applications of this material.

The chemical structure of this substance is as follows:

sodium chlorite structure

Sodium chlorite and sodium chloride are two different chemicals that are sometimes confused. This strong oxidizing compound first appeared about 180 million years ago through the reaction of chloride oxide and chlorine.

This strong oxidizing compound decomposes at a temperature of 200 ° C and has better solubility with temperature increases. Oral consumption of this substance in certain doses is allowed and there is no danger, but use in high doses for a long time can harm the health of the body.

Similar product: calcium chloride

Physical and chemical properties:

Sodium chlorite has good solubility in water and when dried, it can also be greenish-yellow due to the presence of iron from the production process. Its waterless sample does not absorb moisture and remains stable for about 10 years.

The most important physical and chemical properties of this material are summarized in the following table:

Name sodium chlorite
Molecular weight (g/mol) 90.44
Density (g/cm³) 2.5
Melting point (°C) 200
Boiling point (°C) 1461
PH 7
Solubility in water Completely soluble


Sodium chlorite production:

Sodium hydroxide, hydrogen peroxide, and chlorine dioxide are used to produce sodium chlorite. Chlorine dioxide is usually in the form of a gas, chlorine dioxide is used as a source of chlorine, which is later converted to sodium chlorite.

Sodium chlorite is the only member of the chlorite family that is commercially produced as both a solution and a solid.

The industrial production of this chemical is based on the reaction of chlorine dioxide with sodium hydroxide. During the process, hydrogen peroxide is also present as a reducing agent in the reaction medium. The sodium chlorite production process can be divided into three categories: chlorine dioxide production, sodium chlorite production, and recovery stage.

production process:

Chlorine dioxide gas is pumped into a tube containing a cooled sodium hydroxide solution. These compounds react together, and water and oxygen are usually produced during the reaction. In the last step, a crystallization separation tower is used to perform the purification operation.

If the product is water-free, the evaporating powders are mixed in water at a temperature of 38 ° C. The saturated solution is cooled to 25 ° C.

Sodium chlorite production process

When this happens, the salts in the water crystallize spontaneously from the solution. The centrifuge method is used to separate the powders from the solution, resulting in the production of fine powders. Sometimes several drying steps are required.

Applications and uses of sodium chlorite:

As mentioned, sodium chloride is used in various industries, including water and wastewater treatment and chemical purification. By adding this chemical to freshwater, it can play a role in controlling its unpleasant taste and smell and help remove various iron and manganese ions.

sodium chlorite in paper industrial

Sodium chlorite bleaching:

This material is used in the role of bleaching agent in paper production industries, textile industries.

In many natural waxes and cellulose fibers, it helps to increase the quality and makes the fibers more uniform and efficient. This allows the fabric to achieve a permanent white color without compromising its tensile strength.

This chemical is also used in industrial cooling systems and towers, and food processing companies also use it to wash meat and poultry, such as in the production of detergents and toothpaste.

In addition to the above, this substance is also used in medical treatments because sodium chlorite also has medicinal applications and is used in the health sector in the treatment of diseases such as colds, arthritis, malaria, etc.


Oral intake of sodium chloride in small doses may be safe for the body, but this has not yet been formally evaluated through scientific research. However, taking sodium chlorite as an alternative medicine for a long time or in high doses is harmful and can cause symptoms such as these cases: Diarrhea, Headache, nausea, increase amount of saliva, insomnia, Dehydration, …

Transporting and storage:

Store this material in a cool, dry place away from heat.


Where can you buy sodium chlorite?

shanghai Chemex is ready to offer various brands of raw materials required by different industries. All you have to do is contact us through the mentioned communication channels.