noun, Chemistry.
a colorless, crystalline, water-soluble acid of phosphorus, H 3 PO 3 , from which phosphites are derived.
Also called orthophosphorous acid. a white or yellowish hygroscopic crystalline dibasic acid. Formula: H3PO3 Systematic name phosphoric acid
any oxyacid of phosphorus containing less oxygen than the corresponding phosphoric acid
phosphorous acid
(fŏs’fər-əs, fŏs-fôr’əs)
A white or yellowish crystalline solid used as a reducing agent. It is hygroscopic (easily absorbs moisture from the atmosphere). Chemical formula: H3PO3.


Read Also:

  • Phosphorus

    [fos-fer-uh s] /ˈfɒs fər əs/ noun, plural phosphori [fos-fuh-rahy] /ˈfɒs fəˌraɪ/ (Show IPA) 1. Chemistry. a solid, nonmetallic element existing in at least three allotropic forms, one that is yellow, poisonous, flammable, and luminous in the dark, one that is red, less poisonous, and less flammable, and another that is black, insoluble in most solvents, […]

  • Phosphorus-32

    noun, Chemistry. 1. a radioactive isotope of phosphorus, used as a chemotherapeutic agent. phosphorus-32 n. A radioactive beta-emitting isotope of phosphorus having a half-life of 14.3 days and used as a tracer in studies of the metabolism of nucleic acids and phospholipids, and also used in the treatment of certain diseases of the osseous and […]

  • Phosphoruses

    [fos-fer-uh s] /ˈfɒs fər əs/ noun 1. . /ˈfɒsfərəs/ noun 1. an allotropic nonmetallic element occurring in phosphates and living matter. Ordinary phosphorus is a toxic flammable phosphorescent white solid; the red form is less reactive and nontoxic: used in matches, pesticides, and alloys. The radioisotope phosphorus-32 (radiophosphorus), with a half-life of 14.3 days, is […]

  • Phosphorus-pentoxide

    [pen-tok-sahyd, -sid] /pɛnˈtɒk saɪd, -sɪd/ noun, Chemistry. 1. a white, deliquescent, crystalline powder, P 2 O 5 , that, depending upon the amount of water it absorbs, forms orthophosphoric acid, metaphosphoric acid, or pyrophosphoric acid, produced by the burning of phosphorus in dry air: used in the preparation of phosphoric acids, as a drying and […]

Disclaimer: Phosphorous-acid definition / meaning should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. All content on this website is for informational purposes only.