- Sodium pyrophosphate
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ImageFile = Sodium pyrophosphate.png
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IUPACName =
OtherNames = tetrasodium pyrophosphate, tetrasodium phosphate
Section1 = Chembox Identifiers
CASNo = 7722-88-5
PubChem =
SMILES =
Section2 = Chembox Properties
Formula = Na4P2O7
MolarMass = 265.90 g/mol
Appearance = Colourless crystals
Density =
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Section3 = Chembox Hazards
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Autoignition =Sodium pyrophosphate, also called tetrasodium pyrophosphate or tetrasodium phosphate, is a slightly
toxic and mildly irritatingcolor less transparentcrystalline chemical compound with the formula sodium4phosphorus2oxygen7 andCAS number 7722-88-5. It contains thepyrophosphate ion . Toxicity is approximately twice that oftable salt when digested orally. [http://books.google.com/books?id=Mk-IdNTTJB0C&pg=PA259&lpg=PA259&dq=tetrasodium+phosphate+toxicity&source=web&ots=UTcG2wT0y9&sig=_c9T9HRdwiV7pMk01T8ZLTzFkl8#PPA260,M1] . There is a hydrated form, Na4P2O7.10(H2O) which has theCAS number 13472-36-1. D.L. Perry S.L. Phillips (1995) "Handbook of inorganic compounds" CRC Press ISBN 0849386713]Sodium pyrophosphate is used as a
buffering agent , anemulsifier , and athickening agent , and is often used as afood additive . Commonfood s containing sodium pyrophosphate includechicken nugget s,marshmallows ,pudding ,crab meat,imitation crab , cannedtuna , andsoy -basedmeat alternatives. It is the active ingredient in Bakewell, the substitute for baking powder's acid component marketed during shortages in World War II.In
toothpaste and dental floss, sodium pyrophosphate acts as atartar control agent, serving to removecalcium andmagnesium fromsaliva and thus preventing them from being deposited onteeth . Sodium pyrophosphate is sometimes used in householddetergent s to prevent similar deposition onclothing , but due to itsphosphate content it causeseutrophication ofwater , promotingalgae growth.Calcium pyrophosphate is the crystal deposited in joints in the medical condition
pseudogout . [Clinical Medicine, Kumar and Clark, 6th Ed., p. 571]See also
*
Disodium pyrophosphate
*pseudogout
*food allergy References
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