Identifier: americanjournal48phil (find matches)
Title: American journal of pharmacy
Year: 1829 (1820s)
Authors: Philadelphia College of Pharmacy and Science
Subjects: Pharmacy
Publisher: Philadelphia
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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CHARLES BECKER. The addition of the phosphates of ammonium or sodium has beenrecommended to increase the solubility of salicylic acid in water, butthese agents really amount to but very little, as a solvent of i part ofth-e acid in three of either phosphate, and fifty parts (by weight) ofwater throws down a precipitate in less than twenty-four hours. Anaddition of two parts of sulphite of sodium to one of salicylic acid, infifty parts of water, precipitates in a few hours. Borax in the propor-tion of two parts to one of salicylic acid, and fifty of water, precipitatesslightly after twenty-four hours ; a solution of one part each of salicylic-acid and borax, in five parts of glycerin and twenty-five of water, is^permanent; while the same proportion of borax, acid and glycerin, in^ky parts of water, will precipitate after twenty-four hours. A solu-(li-on of one part of acid to two of borax, in twelve parts of glycerin,imade with heat, is permanent; but when one part of this solution is
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RHEUM OFFICINALE, BaUlon.From Neues Rep.noriun,, ,s,r,, January. -^j(?;;-,;76°*) Rhubarb and Rheum Officinale, 307 diluted with three parts of water, which makes it two parts of salicylicacid, four of borax, twenty-four of glycerin and ninety of water, acloudiness appears in a few hours. One part of salicylic acid with onepart of water of ammonia (20°) forms with ten parts of water a perma-nent solution ;—this has a light-brownish color, a very faint odor ofammonia, a very distinct, sweet taste of the acid, and a slight acidreaction on litmus paper. Salicylic acid is soluble in ten times its weight of dilute alcohol, at atemperature of about 80° F., in one and a half times its weight ofalcohol (0*835 sp. gr.), and in twice its weight of sulphuric ether It isnearly insoluble in cold oil of turpentine, but hot turpentine dissolvesabout 5 per cent, of its weight. Its alcoholic solution has a decidedacid reaction on litmus paper. An addition of one-fifth of i per cent,of salicylic ac

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