disodium pyrophosphate

Disodium pyrophosphate (SAPP) is an inorganic compound with the chemical formula Na2H2P2O7. It consists of sodium cations and dihydrogen pyrophosphate anions. It is a white, water-soluble solid that serves as a buffering and chelating agent with many applications in the food industry. In food processing, it functions as a leavening agent in baking powders, where it combines with sodium bicarbonate to release carbon dioxide. It also helps maintain color in processed potatoes and prevents struvite crystal formation in canned seafood. When used in cosmetics, it helps control pH levels and prevents packaging from rusting.

Other names

sodium acid pyrophosphateSAPPdisodium diphosphatedisodium dihydrogen pyrophosphatedisodium dihydrogen diphosphatediphosphoric acid disodium saltpyrophosphoric acid disodium salt