SODIUM METABISULFITE PACKAGING 25 kg

Product Documents
SODIUM METABISULFITE CERTIFICATE OF ANALYSIS

What is Sodium Metabisulfite?

Molecular Formula (Sodium Metabisulfite): Na₂S₂O₅

Molecular Weight: 190.05 g/mol

Chemical Name: Sodium Metabisulfite

CAS Number: 7681-57-4

It is a white crystalline powder with a slight sulfur odor. It is toxic if inhaled. It is a strong irritant to the skin and tissue. When mixed with water, it acquires corrosive acidic properties.

SMBS is an inorganic sodium salt composed of sodium and disulfite ions in a 2:1 ratio. It generally acts as a food antioxidant. The structure of Sodium Metabisulfite contains bisulfite.

When dissolved in water, it releases SO3 and HSO3 ions into the medium.

E Number: E223

Other names include the following:

Sodium Pyrosulfite
Sodium Bisulfite anhydrous
Pyrosulfuric Acid, disodium salt
7681-57-4
Pyrosulfite
Disulfite
Metabisulfite
Natrium Pyrosulfite
SMBS
E 223

How is it Produced?

Sodium Metabisulfite (Sodium disulfite) is produced by treating a 50-70% sodium hydroxide or sodium carbonate suspension with gases containing sulfur dioxide in a saturated sodium hydrogen sulfite solution. It is removed by centrifugation and then dried.

The production reaction for this chemical is as follows:

Na₂CO₃ + 2SO₂ 》Na₂S₂O₅ +CO₂

Another method of production is through thermal dehydration. It can also be prepared by passing sulfur dioxide through sodium carbonate.

These are the dominant methods for producing this raw material, varying based on cost advantages and installation expenses.

What are the Physical and Chemical Properties of Sodium Metabisulfite?

Physically, it is a solid chemical substance in the form of a white crystalline powder. Its color ranges from white to slightly yellow.

Melting point is 150 °C.

Boiling Point: Decomposes.

Density is 1.48 g/cm³.

Solubility is 540 g/L at 20 °C.

Sodium Metabisulfite is a chemical that is sensitive to air and moisture. Therefore, contact with air and water should be avoided. It must be stored in dry areas.

It is a stable chemical. It is incompatible with strong oxidizing agents and strong acids. Contact with strong acids releases toxic gas.

Working Principle in Foods

The cheapest and most effective anti-browning agents are sulfites. Through the action of sulfites, quinones produced by the catalysis of polyphenol oxidase are reduced to less reactive and colorless compounds. Sodium Metabisulfite reactions prevent this pigmentation from occurring.

In the baking industry, the sulfite level in ingredients used to make dough is low. Sulfites act by breaking the cysteine disulfide bonds in the gluten fraction of the dough. They emerge with the dissolution of this raw material. It exists in several forms: SO₂, H_SO₂^–, SO₃^-2 and S₂O₅.

Applications of Sodium Metabisulfite

It is used as a food additive. In this field, it is used as an antioxidant.
It is used to remove cloudiness in beverages. This is a chelating effect.
It is used in the production of frozen potatoes as a preservative and to prevent browning.
It can be used as an oxidizing and reducing agent in industry.
It can be used as a surface treatment agent in the coating industry.
In the food industry, sodium metabisulfite is a more widely consumed preservative compared to other preservative chemicals. The reason for this is its cost advantage over other preservative chemicals.
Sodium metabisulfite is used in the cellulose and paper industry, the photography industry, and as a bleach and chlorine remover.
It is used in the oil and gas industry. It is used as a whitening agent in the production of coconut cream.
It is used as a corrosion inhibitor in the cyanidation processes of commercial gold for the destruction of cyanide.
SMBS is used as an antioxidant and bleaching agent in soft drinks, fruit juices, canned goods, wines, and in the production of sauerkraut.
The chemical that acts as an oxygen scavenger to remove dissolved oxygen from wastewater and pipes is SMBS.
In the gold mining industry, it is used to precipitate gold from auric acid and in wastewater treatment to remove trivalent chromium after a reduction process. The chromium in the wastewater is hexavalent (+6). A sodium metabisulfite solution is created to convert the +6 valent chromium to a +3 valent state. Then, Ferric Chloride and Iron Sulfate salt are added.
In various studies, it is added as an antioxidant during the preparation of 6-hydroxydopamine stock solutions.
It is used in the photography industry in the field of photo developing.
During wine production, oxidation occurs in the process of making and aging the wine. Oxidation negatively affects the fruit taste and freshness of the wine. To prevent wine oxidation, Potassium Metabisulfite or Sodium Metabisulfite is used.
It is a chemical used especially in white wine production to prevent yeast activity.
This helps to inhibit all bacteria from the moment alcohol production begins in the fermentation process.
This is the substance used as an antioxidant in drilling fluids.
It is used modified with ascorbic acid to increase the Glucomannan value and whiteness of flour.
It is used in the manufacture of medications for the treatment and care of cracks that occur on the areolas of lactating women.
In the production of anti-inflammatory drugs, metabisulfite is used as a preservative along with carbomer, triethanolamine, and the active ingredient.
SMBS is used to prevent free oxygen, which causes the formation of Acetic Acid in wine.
In the leather industry, it is used with Lactic Acid during the leather softening stage. This application is to prevent the degradation of Organic Acids.
It is used to prevent color loss in the production of fruit juice, vinegar, and marmalade.

What Factors Affect Its Price?

The price of Sodium Metabisulfite is directly proportional to the prices of the chemicals used in its production. As the price of Sodium Carbonate or Sodium Hydroxide used in production increases, the price will increase.

As companies that produce Sodium Metabisulfite increase their production of SMBS, the price of this chemical will decrease. As production decreases, the price will increase.

The price of this chemical will decrease when a new production facility is established because the SMBS produced will more than meet the demand.