CAS 7681-57-4 Chemical Food Ingredients Sodium Metabisulfite 96.5% E223

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Product Details
Type Sodium Metabisulfite Application Food Additives, Cleaning Agent
Appearance White Powder CAS No 7681-57-4
MF Na2S2O5 Purity 96.5%
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CAS 7681-57-4 Chemical Food Ingredients


Sodium Metabisulfite E223


Food Additives Sodium Metabisulfite

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Product Description


Sodium metabisulfite or sodium pyrosulfite (IUPAC spelling; Br. E. sodium metabisulphite or sodium pyrosulphite)



Sodium metabisulfite is a chemical compound that is commonly used as a food preservative and antioxidant. It is also used in many other industries, including the pharmaceutical, textile, and water treatment industries.


Chemical properties:

Sodium metabisulfite is a white or yellowish powder that is composed of sodium, sulfur, and oxygen. It is water-soluble and readily dissolves in water to form sulfur dioxide gas.



Sodium metabisulfite is widely used in the food industry as a preservative and antioxidant. It is often used in wine, beer, and other fermented foods to prevent the growth of harmful bacteria and to extend shelf life. It can also be used in dried fruits, canned foods, and potato products.



Sodium metabisulfite is generally recognized as safe (GRAS) by the US Food and Drug Administration (FDA) when used in accordance with good manufacturing practices.


Sodium metabisulfite or sodium pyrosulfite Is an inorganic compound of chemical formula Na2S2O5. The substance is sometimes referred to as disodium (metabisulfite). It is used as a disinfectant, antioxidant and preservative agent.


Sodium Metabisulfite Food Grade

Items Standards
Assay % 96.5
Fe % 0.005 Max
Water insoluble % 0.05 Max
As % 0.0001 Max


Sodium Metabisulfite Uses
1. Food additive
It is used as a preservative and antioxidant in food and is also known as E223.

It may cause allergic reactions in those who are sensitive to sulfites, including respiratory reactions in asthmatics, anaphylaxis and other allergic reactions in sensitive individuals.

Sodium metabisulfite and potassium metabisulfite are the primary ingredients in Campden tablets, used for wine and beer making.

The acceptable daily intake is up to 0.7 milligrams per kilogram of body weight. Sodium metabisulfite oxidizes in the liver to sulfate which is excreted in the urine.

2. Sanitization and cleaning agent
It is commonly used in homebrewing and winemaking to sanitize equipment. It is used as a cleaning agent for potable water reverse osmosis membranes in desalination systems. It is also used to remove chloramine from drinking water after treatment.

3.Other uses



CAS 7681-57-4 Chemical Food Ingredients Sodium Metabisulfite 96.5% E223 0