orthophosphorous acid

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

noun

, Chemistry.

1. a white to yellowish, crystalline, hygroscopic, water-soluble solid, H 3 PO 3 , used chiefly in the synthesis of phosphites.

orthophosphorous acid

/ ˌɔːθəʊˈfɒsfərəs /

noun

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

Word History and Origins

Origin of orthophosphorous acid¹

ortho- + phosphorous acid