Tetrasodium Pyrophosphate

Other names: Sodium pyrophosphate, tetrasodium diphosphate, TSPP

Harm score: 2 (Derivatives of natural substances)

Tetrasodium pyrophosphate, also known as sodium pyrophosphate, tetrasodium diphosphate or TSPP, is a chemical widely used in the food industry and processes. This inorganic chemical compound of sodium and pyrophosphoric acid is a colorless, crystalline powdery substance that is soluble in water. Its main use lies in its ability to regulate the acidity of products, to aid the food preservation process and to act as an emulsifier.

Tetrasodium pyrophosphate is widely used in the food industry, specifically in the production of, for example, canned tuna, cheese, salami, sausages and other meat products. It is also a component of ingredients in baked products, canned vegetables and fruits, and ice cream. In some food categories, it serves to separate proteins and fats. In addition, it has a place in the toiletries industry, where it is used as a component of bleaching and disinfecting preparations and toothpastes. In the cosmetics industry, it is added to some bath salts, shampoos and other products. It also finds applications in the textile industry in the treatment of fibres, in the petrochemical industry in the manufacture of detergents and in metallurgy where it is used as a corrosion inhibitor. However, despite its extensive use, caution should be exercised when handling TSPP as it can cause skin and eye irritation with prolonged exposure.