TSPP can be produced by the neutralization of phosphoric acid with sodium hydroxide with mol proportions of 2:1.
Food grade TSPP exists as two forms, and follows the corresponding chemical formula:
TSPP Anhydrous: Na4P2O7
TSPP Decahydrate: Na4P2O7 · 10H2O
http://www.chinafooding.com/Tetrasodium_pyrophosphate
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