It is a white, water-soluble solid that serves as a buffering and chelating agent, with many applications in the food industry.

It combines with sodium bicarbonate to release carbon dioxide: It is available in a variety of grades that affect the speed of its action.

In canned seafood, it is used to maintain color and reduce purge[clarification needed] during retorting.

[4] Disodium pyrophosphate can leave a slightly bitter aftertaste in some products, but "the SAPP taste can be masked by using sufficient baking soda and by adding a source of calcium ions, sugar, or flavorings.

"[1] In leather treatment, it can be used to remove iron stains on hides during processing.