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| H3PO4 | 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] |
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