Sodium+pyrophosphate


 * Tetrasodium pyrophosphate **, also called ** sodium pyrophosphate ** , ** tetrasodium phosphate ** or TSPP, is a [|colorless] [|transparent] [|crystalline][|chemical compound] with the [|formula] Na4P2O7. It contains the [|pyrophosphate] [|ion] and [|sodium][|cation] . Toxicity is approximately twice that of [|table salt] when ingested orally. [|[1]] There is also a hydrated form, Na4P2O7 ·10(H2O). [|[2]]

__**Uses**__ Sodium pyrophosphate is used as a [|buffering agent], an [|emulsifier] , a dispersing agent, and a [|thickening agent] , and is often used as a [|food additive]. Common [|foods] containing sodium pyrophosphate include [|chicken nuggets], [|marshmallows] , [|pudding] , [|crab] meat, [|imitation crab] , canned [|tuna] , and [|soy] -based [|meat] alternatives and [|cat foods] and cat treats where it is used as a [|palatability] enhancer. It is the active ingredient in Bakewell, the substitute for baking powder's acid component marketed during shortages in World War II. It is also used in some common [|baking powders]. It is in toothpaste and dental floss and uses tartar as a control agent. It is also used in food detergents.



Production
Tetrasodium phosphate is produced by the reaction of furnace-grade phosphoric acid with sodium carbonate to form disodium phosphate, which is then heated to 450 °C to form tetrasodium phosphate.