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GRADE : TECHNICAL
Tetrasodium pyrophosphate, also called sodium pyrophosphate, tetrasodium phosphate or TSPP, is an inorganic compound with the formula Na4P2O7. As a salt, it is a white, water-soluble solid. It is composed of pyrophosphate anion and sodiumions. Toxicity is approximately twice that of table salt when ingested orally. Also known is the decahydrate Na4P2O710(H2O).