Orthophosphorous Acid (noun) Definition, Meaning & Examples

noun Chemistry.
  1. a white to yellowish, crystalline, hygroscopic, water-soluble solid, H3PO3, used chiefly in the synthesis of phosphites.
noun
  1. a white or yellowish hygroscopic crystalline dibasic acid. Formula: H 3 PO 3
Orthophosphorous Acid (noun) Definition, Meaning & Examples

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