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py'ro•phos•phor'ic ac'id



Pronunciation: (pī'rō-fos-fôr'ik, -for'-, pī"-), [key] Chem.
a crystalline, water-soluble powder, H4P2O7, formed by the union of one molecule of phosphorus pentoxide with two molecules of water.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

pyrophosphatepyrophotometer
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