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. - In colourless crystals, the primary form of which is the oblique rhombic prism. It has a strongly acid taste, and is readily soluble in water and in rectified spirit. When to either solution, not too much diluted, a little acetate of potassium is added, a white crystalline precipitate is formed.
20 grains neutralise
15 1/2 ,, carbonate of ammonium.
Preparation. - Vide p. 566.
Tests. - An aqueous solution of the acid is not affected by sulphuretted hydrogen (absence of metals), and gives no precipitate with the solution of sulphate of calcium (no racemic or oxalic acids), or of oxalate of ammonium (no calcium). It leaves no residue, or only a mere trace, when burned with free access of air (no acid tartrate of potassium).
Dose. - 10 to 30 grains.
Action and Uses. - Used for cooling drinks.