Phosphoric acid

Phosphoric acid
Phosphoric Phos*phor"ic, a. [Cf. F. phosphorique.] 1. (Chem.) Of or pertaining to phosphorus; resembling, or containing, from us; specifically, designating those compounds in which phosphorus has a higher valence as contrasted with the phosphorous compounds. [1913 Webster]

2. Phosphorescent. ``A phosphoric sea.'' --Byron. [1913 Webster]

{Glacial phosphoric acid}. (Chem.) (a) Metaphosphoric acid in the form of glassy semitransparent masses or sticks. (b) Pure normal phosphoric acid.

{Phosphoric acid} (Chem.), a white crystalline substance, {H3PO4}, which is the most highly oxidized acid of phosphorus, and forms an important and extensive series of compounds, viz., the phosphates.

{Soluble phosphoric acid}, {Insoluble phosphoric acid} (Agric. Chem.), phosphoric acid combined in acid salts, or in neutral or basic salts, which are respectively soluble and insoluble in water or in plant juices.

{Reverted phosphoric acid} (Agric. Chem.), phosphoric acid changed from acid (soluble) salts back to neutral or basic (insoluble) salts. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • phosphoric acid — n. any of several oxygen acids of phosphorus: see ORTHOPHOSPHORIC ACID, METAPHOSPHORIC ACID, and PYROPHOSPHORIC ACID …   English World dictionary

  • phosphoric acid — ► NOUN Chemistry ▪ a crystalline acid obtained by treating phosphates with sulphuric acid …   English terms dictionary

  • Phosphoric acid — This article is about orthophosphoric acid. For other acids commonly called phosphoric acid , see Phosphoric acids and phosphates. Phosphoric acid …   Wikipedia

  • phosphoric acid — Chem. any of three acids, orthophosphoric acid, H3PO4, metaphosphoric acid, HPO3, or pyrophosphoric acid, H4P2O7, derived from phosphorus pentoxide, P2O5, and various amounts of water. [1785 95] * * * ▪ chemical compound also called… …   Universalium

  • phosphoric acid — Orthophosphoric acid; a strong acid of industrial importance; m.p. 42.35°C; dilute solutions have been used as urinary acidifiers and as dressings to remove necrotic debris. In dentistry, it constitutes about 60% of the liquid used in zinc… …   Medical dictionary

  • phosphoric acid — noun an acid used in fertilizers and soaps: H3PO4 • Syn: ↑orthophosphoric acid • Hypernyms: ↑oxyacid, ↑oxygen acid * * * phosphoric acid f17 [phosphoric acid] [fɒsˌfɒrɪk ˈæsɪd] …   Useful english dictionary

  • phosphoric acid — [[t]fɒsfɒ̱rɪk æ̱sɪd, AM fɔ͟ːr [/t]] N UNCOUNT Phosphoric acid is a type of acid which contains phosphorus. [TECHNICAL] …   English dictionary

  • phosphoric acid — ortofosfato rūgštis statusas T sritis chemija formulė H₃PO₄ atitikmenys: angl. orthophosphoric acid; phosphoric acid rus. ортофосфорная кислота; фосфорная кислота ryšiai: sinonimas – vandenilio tetraoksofosfatas (3–) sinonimas – fosforo rūgštis …   Chemijos terminų aiškinamasis žodynas

  • Phosphoric acid fuel cell — Phosphoric acid fuel cells (PAFC) are a type of fuel cell that uses liquid phosphoric acid as an electrolyte. The electrodes are made of carbon paper coated with a finely dispersed platinum catalyst, which make them expensive to manufacture. They …   Wikipedia

  • phosphoric acid diluted — [NF] a preparation of phosphoric acid in purified water, containing 9.5–10.5 g phosphoric acid per mL; it is used as a solvent in pharmaceutical preparations and orally as a gastric acidifier …   Medical dictionary

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