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Free Books / Health and Healing / Treatise On Materia Medica / | ![]() |
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Acidum Tannicum. Tannic Acid |
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This section is from the "A Practical Treatise On Materia Medica And Therapeutics" book, by Roberts Bartholow. Also available from Amazon: A Practical Treatise On Materia Medica And Therapeutics
Tannic acid. Tanin, Fr.; Tanninum, Ger.
Tannic acid has a yellowish-white color and strongly astringent taste. It is soluble in about 1 part of water, in 0·6 part of alcohol, and in 1 part of glycerin with a moderate heat. Its solution reddens litmus, and produces, with solution of gelatin, a white, flocculent precipitate; with the salts of the sesquioxide of iron a bluish-black precipitate; and with solutions of the alkaloids white precipitates, very soluble in acetic acid. Dose, gr. j— Э j.
Styptic collodion. (Tannic acid, 20 grm.; alcohol, 5c. c; stronger ether, 25 c. c; collodion, q. s. to make 100 c. c.)
Troches of tannic acid. (Each troche contains one grain of tannic acid.)
Ointment of tannic acid. (Tannin, 20 grm.; benzoinated lard, 80 grm.)
Glycerite of tannic acid. (Tannic acid, 20 grm.; glycerin, 80 grm.)
 
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