orthophosphorous acid

[awr-thuh-fos-fer-uhs, awr-thoh-fos-fawr-uhs, -fohr-]

or·tho·phos·pho·rous ac·id

[awr-thuh-fos-fer-uhs, awr-thoh-fos-fawr-uhs, -fohr-]
noun Chemistry.
a white to yellowish, crystalline, hygroscopic, water-soluble solid, H3PO3, used chiefly in the synthesis of phosphites.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Orthophosphorous acid is always a great word to know.
So is saturated. Does it mean:
existing as free, uncombined atoms
a solution containing the maximum amount of solute capable of being dissolved under given conditions
Collins
World English Dictionary
orthophosphorous acid (ˌɔːθəʊˈfɒsfərəs)
 
n
Also called: phosphorous acid a white or yellowish hygroscopic crystalline dibasic acid. Formula: H3PO3

Collins English Dictionary - Complete & Unabridged 10th Edition
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