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Phosphoricum, U.S.P. Phosphoric Acid. - Phosphoric acid, H3P04, with 33.7 per cent. of water, B.P. A liquid composed of 50 per cent. of ortho-phosphoric acid (H3PO4; 98) and 50 per cent. of water, U.S.P |
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This section is from the book "A Text-Book Of Pharmacology, Therapeutics And Materia Medica", by T. Lauder Brunton. Also available from Amazon: A text-book of pharmacology, therapeutics and materia medica.
Characters. - A colourless syrupy liquid, without odour, and of a strongly acid taste and reaction, sp. gr. 1.347. When heated it loses water, and when a temperature of about 200° C. (392° F.) has been reached, the acid is gradually converted into pyro-phosphoric and metaphosphoric acids, which may be volatilised at a red heat.
Preparation. - Oxidising phosphorus by nitric acid. Vide p. 567.
reactions. - When diluted, and supersaturated with ammonia, the test-solution of magnesium gives a white precipitate. Vide also the reactions and tests of acidum phosphoricum dilutum.
Preparations containing Free Phosphoric Acid.
B.P
Acidum Phosphoricum Dilutum. Syrupus Ferri Phosphatis.
U.S.P
Acidum Phosphoricum Dilutum.
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