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or'tho•phos'pho•rous ac'id



Pronunciation: (ôr'thu-fos'fur-us, ôr"thō-fos-fôr'us, -fōr'-), [key] Chem.
a white to yellowish, crystalline, hygroscopic, water-soluble solid, H3PO3, used chiefly in the synthesis of phosphites.

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

orthophosphoric acidorthophyric
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