orthophosphoric acid

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ortho- +‎ phosphoric acid


orthophosphoric acid (uncountable)

  1. (inorganic chemistry) Ordinary phosphoric acid, H3PO4
    • 1861, William Odling, A Manual of Chemistry, Descriptive and Theoretical, Part 1[1], page 297:
      Metaphosphoric acid gives a white precipitate with nitrate of silver solution; orthophosphoric acid does not give any, save on the addition of an alkali, and the precipitate then produced is yellow.
    • 1918, Herbert Royl Smith, The Laboratory Study of Chemistry[2], page 124:
      Evaporate 25 cc. of orthophosphoric acid solution to dryness, setting the burner beneath the dish and adjusting the flame so that the tip does not quite touch the dish.
    • 2000, Nicholas P. Cheremisinoff, Practical Guide to Industrial Safety: Methods for Process Safety Professionals[3]:
      With the exception of the fertilizer products, most phosphorus compounds are derived from orthophosphoric acid, produced by the oxidation of elemental phosphorus.

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