Meanings
nounhypophosphorous acid (plural hypophosphorous acids)
plural hypophosphorous acids
- chemistryA pale yellow liquid, H₃PO₂, used as a reducing agent.
Synonyms & antonyms
nouna clear or yellow monobasic acid (H3PO2)
Similar
phosphorous acidorthophosphorous acid
Broader
oxyacidoxygen acid
Also see
Synonym sets from Open English WordNet, CC BY 4.0.
Translations
Chinese Mandarin 次磷酸
- 次磷酸a pale yellow liquid
Finnish hypofosforihapoke
- hypofosforihapokea pale yellow liquid
French acide hypophosphoreux
- acide hypophosphoreuxa pale yellow liquid
Hungarian hipofoszforossav
- hipofoszforossava pale yellow liquid
Icelandic fosfórundirsýrlingur
- fosfórundirsýrlingura pale yellow liquid
Italian acido ipofosforoso
- acido ipofosforosoa pale yellow liquid
Polish kwas fosfinowy
- kwas fosfinowya pale yellow liquid
Romanian acid hipofosforos
- acid hipofosforosa pale yellow liquid
Russian фосфорнова́тистая кислота́, гипофо́сфористая кислота́
- фосфорнова́тистая кислота́ (fosfornovátistaja kislotá)a pale yellow liquid
- гипофо́сфористая кислота́ (gipofósforistaja kislotá)a pale yellow liquid
Spanish ácido hipofosforoso
- ácido hipofosforosoa pale yellow liquid
Swedish hypofosfinsyra, underfosforsyrlighet
- hypofosfinsyraa pale yellow liquid
- underfosforsyrligheta pale yellow liquid
Cite this entry
APA
hypophosphorous acid. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/hypophosphorous%20acid
MLA
“hypophosphorous acid.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/hypophosphorous%20acid. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “hypophosphorous acid,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/hypophosphorous%20acid.
Source: hypophosphorous acid on Wiktionary, CC BY-SA 4.0.