orthophosphorous acid

[awr-thuh-fos-fer-uh s, awr-thoh-fos-fawr-uh s, -fohr-]
noun Chemistry.
  1. a white to yellowish, crystalline, hygroscopic, water-soluble solid, H3PO3, used chiefly in the synthesis of phosphites.

Origin of orthophosphorous acid

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British Dictionary definitions for orthophosphorous acid

orthophosphorous acid

noun
  1. a white or yellowish hygroscopic crystalline dibasic acid. Formula: H 3 PO 3Also called: phosphorous acid
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