E450iii - Tetranatriumdiphosphat

Origin

Tetrasodium diphosphate, also known as tetrasodium pyrophosphate (TSPP), is an inorganic salt formed by reacting sodium carbonate with phosphoric acid, followed by calcination. It is synthetically produced and does not occur naturally in significant quantities. It belongs to the family of diphosphates, which are salts containing the pyrophosphate anion.

Usage

TSPP is widely used in the food industry as a buffering agent, emulsifier, dispersing agent, and thickening agent. It helps to control the acidity of food products, improve texture, and prevent the separation of ingredients. Specific applications include processed meats (e.g., sausages, ham), seafood (e.g., canned tuna, crab), baked goods, and dairy products (e.g., processed cheese). It is also used in non-food applications such as detergents, water treatment, and metal finishing.

Side Effects

Tetrasodium diphosphate is generally considered safe for consumption at levels typically used in food processing. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has established an Acceptable Daily Intake (ADI) of 0-70 mg/kg body weight for phosphates, including tetrasodium diphosphate, expressed as phosphorus. Excessive intake of phosphates can potentially lead to imbalances in mineral metabolism, particularly calcium and phosphorus, which could affect bone health, especially in individuals with kidney problems. However, these effects are usually associated with very high intakes, far exceeding those from typical food additive use. Some individuals may experience mild gastrointestinal discomfort with high doses. Regulatory bodies like EFSA and FDA have reviewed the safety data and permit its use within specified limits.

Regulatory Status

Tetrasodium diphosphate is approved for use as a food additive in many countries, including the United States, the European Union, and Canada. In the EU, it is designated as E450(iii). Regulatory limits vary depending on the specific food application. The FDA regulates its use under 21 CFR Part 182 as Generally Recognized As Safe (GRAS) when used in accordance with good manufacturing practices.