Sodium pyrosulfite (E223) – what is it?
Sodium pyrosulfite, also known as sodium metabisulfite, is a chemical compound with the formula Na2S2O5. It is one of the food additives, mainly used as a preservative and antioxidant. Thanks to its properties, it prevents the growth of bacteria, mold and yeast, thus extending the freshness and shelf life of food products.
The substance is also used in the wine industry, where it is used to stabilize color and prevent unwanted fermentations. Sodium pyrosulfite works by releasing sulfur dioxide (SO2), which is a preservative.
Properties of sodium pyrosulfite
E223 is well soluble in water, making it easy to use in various production processes. As a strong reducing agent, it can also act as an antioxidant, protecting food products from oxidation and color changes.
Uses of sodium pyrosulfite
It is widely used in food processing, including the production of wines, juices, dried fruits, and the preservation of meats and fish. It is also used in the baking industry to maintain the freshness and color of finished products.
Where to buy sodium pyrosulfite?
Sodium pyrosulfite is available in specialty stores with raw materials for the food industry and in some pharmacies. It can also be easily found in online stores offering food additives and chemical raw materials.
Sodium pyrosulfite and its functions in food
As a preservative, E223 effectively extends the shelf life of food products, preventing spoilage. As an antioxidant, it protects the color and flavor of products from damage by air. Sodium pyrosulfite also plays an important role in the wine-making process, where it prevents oxidation and preserves the natural flavor and aroma of beverages.
