phosphorous acid

noun

a yellowish hygroscopic solid, H₃PO₃; a mild reducing agent

Similar
hypophosphorous acidorthophosphorous acid
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Meanings

nounphosphorous acid (uncountable)
  1. uncountablechemistrya yellowish hygroscopic solid, H₃PO₃; a mild reducing agent

Synonyms & antonyms

nouna clear or yellow monobasic acid (H3PO2)

Similar
hypophosphorous acidorthophosphorous acid
Broader
oxyacidoxygen acid
Also see
hypophosphorous acid

Synonym sets from Open English WordNet, CC BY 4.0.

Translations

French acide phosphoreux
  • acide phosphoreuxH3PO3
German Phosphonsäure, phosphorige Säure
  • PhosphonsäureH3PO3
  • phosphorige SäureH3PO3
Japanese 亜燐酸
  • 亜燐酸 (arinsan)H3PO3
Polish kwas fosfonowy
  • kwas fosfonowyH3PO3
Romanian acid fosforos
  • acid fosforosH3PO3
Russian фо́сфористая кислота́
  • фо́сфористая кислота́ (fósforistaja kislotá)H3PO3
Swedish fosforsyrlighet
  • fosforsyrlighetH3PO3
Cite this entry
APA

phosphorous acid. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/phosphorous%20acid

MLA

“phosphorous acid.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/phosphorous%20acid. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “phosphorous acid,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/phosphorous%20acid.

Source: phosphorous acid on Wiktionary, CC BY-SA 4.0.