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Sodium sulfite CAS:7757-83-7

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Sodium sulfite CAS:7757-83-7

CAS: 7757-83-7

MF: Na2O3S

MW: 126.04

EINECS: 231-821-4

About: Sodium sulfite is used to make cellulose sulfite, sodium thiosulfate, organic chemicals, bleached fabrics, etc. It is also used as reducing agent, preservative, dechlorination agent, etc.



Sodium sulfite CAS:7757-83-7 Product introduction

Product name: Sodium sulfite

CAS: 7757-83-7

MF: Na2O3S

MW: 126.04

Appearance: White to slightly yellow Solid.

Sodium sulfite properties :

Sodium sulfite is an inorganic compound. Sodium sulfite 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 Chemicalbook and reacts with acid to produce toxic sulfur dioxide gas, the pH of 1% aqueous solution is 8.3~9.4, strong Restorative. When heated, Sodium sulfite is decomposed into sodium sulfide and sodium sulfate, and it is gradually oxidized to sodium sulfate when placed in the air.

Sodium sulfite COA:

Item industrial-grade Food grade
                 Purity (in Na2SO3) ≥96.0% ≥98.0%
硫酸钠 ( SO4) ≤2.5% ≤1.5%
氯化物 ( 以 NaCL 计) ≤0.5% ≤0.1%
砷 ( As ) ≤0.0002%
重金属( 以 Pb 计) ≤0.0005%
铁 (Fe) ≤0.005% ≤0.002%
Water insoluble substance ≤0.05% ≤0.02%

Sodium sulfite Application

1.Reductive bleaching agent has a bleaching effect on food and a strong inhibitory effect on oxidase in vegetable food.
2.Used as general analytical reagents and photoresistor materials.
3.For microanalytical determination of tellurium and niobium and formulation of developing solutions, also used as reducing agent.
4.Sodium sulfite as a deoxidizer and bleaching agent in the printing and dyeing industry, it is used in the scouring of various cotton fabrics, which can prevent the local oxidation of cotton fibers and affect the fiber strength, and improve the whiteness of the scouring products. The photosensitive industry is used as a developer. It is used in the organic industry as a reducing agent for the production of m-phenylenediamine, 2,5-dichloropyrazolone, anthraquinone-1- sulfonic acid, 1-aminoanthraquinone, sodium aminosalicylate, etc., which can prevent semi- finished products during the reaction process. Oxidation. The paper industry is used as a lignin remover. The textile industry is used as a stabilizer for man-made fibers. The electronics industry is used to make photoresistors. The water treatment industry is used for the treatment of electroplating wastewater and drinking water.
5.Sodium sulfite is used to make cellulose sulfite, sodium thiosulfate, organic chemicals, bleached fabrics, etc. It is also used as reducing agent, preservative, dechlorination agent, etc.

Sodium sulfite Package

– 25kg moisture-proof woven bag lined with two layers of plastic bags,
– 1000kg moisture-proof big bag lined with two layers of plastic bags.

Sodium sulfite storage and transportation:

Should be stored in a dry, cool, well-ventilated place.
To prevent sun exposure, isolate from fire and heat sources, and do not store and transport with ammonia, oxygen, phosphorus, antimony powder and alkalis. It should be kept away from sawdust, shavings, straw, etc. to prevent burning.

Sodium sulfite Related Products:

Magnesium carbonate 546-93-0
Sodium metabisulfite 7681-57-4
Sodium bisulfite 7631-90-5
Sodium sulfite 7757-83-7
Calcium chloride 10043-52-4
Ammonium bicarbonate 1066-33-7
Sodium nitrite 7632-00-0


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3. What is the purpose of Sodium sulfite?

Detailed usage is in the product details page.


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