Sodium acid pyrophosphate (SAPP) or disodium pyrophosphate is a white, water-soluble inorganic compound that contains sodium cations and pyrophosphate anion. It functions as a chelating and buffering agent, finding numerous applications in the food industry. When it crystallizes from water, it creates a hexahydrate, but it loses water molecules above room temperature.
It is used along with other sodium and potassium polyphosphates in food processing, and leather treatment to eliminate iron stains. Additionally, it is helpful as a stabilizer for hydrogen peroxide solutions against reduction and as a cleaning agent with sulfamic acid in some dairy applications. Meanwhile, it speeds up the removal of hair, scurf, feathers, and scurf in poultry, hog slaughter, and petroleum production. Furthermore, it serves as a palatability additive in cat foods and is crucial to tartar control in toothpaste.
