Other names for the additive (synonyms)
General Information
Food additive E450(i) (disodium diphosphate) is one of the members of the pyrophosphate group (additive E450), which belongs to the class of phosphates. Additive E450(i) is also commonly referred to as disodium diphosphate. It is a synthetic inorganic compound formed by combining two molecules of orthophosphate at high temperature.
Sodium acid pyrophosphate typically appears as a white crystalline powder or granules, odorless, readily soluble in water but not in fats. Its chemical formula is Na₂H₂P₂O₇.
Uses
Due to its ability to bind calcium and magnesium ions and stabilize texture, E450(i) is used as a stabilizer, leavening agent, and emulsifier in various sectors of the food industry.
In canned seafood products, additive E450(i) is used to preserve the color of products during sterilization. In bakery products, sodium pyrophosphate is used as an acid source for reaction with baking soda.
In the meat industry, sodium acid pyrophosphate is used to accelerate the breakdown of sodium nitrite and to retain moisture in finished products.
Additionally, disodium pyrophosphate is often used in the production of potato-based convenience foods. Products are treated with additive E450(i) to prevent darkening of potatoes due to oxidation.
E450(i) is also added to processed cheeses, confectionery, powdered milk, and instant foods.
Beyond the food industry, disodium pyrophosphate is used:
- for stain removal in leather and fur processing;
- in the dairy industry for cleaning equipment;
- in the oil industry;
- in the cosmetics industry (e.g., hair dyes, toothpastes).
Sodium acid pyrophosphate is the most common type among pyrophosphates and is considered a standard additive in the food industry. It is often combined with other phosphates to achieve desired technological effects, such as improved texture or prevention of moisture loss.
More information on effects on the body, benefits and risks of pyrophosphates, as well as scientific assessments and legal status, can be found in the general description of additive E450.
