The Pharmacopoeia of the United States of America

The Pharmacopoeia of the United States of America

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 edition. Excerpt: ... matters), and should not effervesce upon the addition of diluted acids (absence of carbonate). If copper sulphate T.S. be added to an aqueous solution of the salt (1 in 20), the mixture should have a bright green color. If a few drops of ferric chloride T.S. be added to an excess of a concentrated aqueous solution of Lithium Salicylate (1 in 4), a deep red color will be produced, which, after the liquid is largely diluted and mixed with more ferric chloride T.S., will change to a deep bluish-violet tint. Upon adding to 0.5 Gm. of the salt, in a test-tube, about 1 Cc. of concentrated sulphuric acid, and cautiously, drop by drop, about 1 Cc. of methyl alcohol, then, on heating the mixture to boiling, the odor of oil of gaultheria will be evolved. If an excess of hydrochloric acid be added to a concentrated aqueous solution of 0.7 Gm. of Lithium Salicylate, a voluminous precipitate of salicylic acid will be formed, which, after collecting upon a filter and thoroughly washing and drying, should conform to the reactions and tests given under Acidum Salicylicum. If the filtrate and washings from this precipitate be evaporated almost to dryness on a water-bath, in a flat-bottomed flask of 50 Cc. capacity, and 10 Cc. of amyl alcohol (boiling point 132 C.) added, and if, after cautiously heating until the lower aqueous layer has evaporated, 3 drops of hydrochloric acid be added and the solution boiled for three minutes, the resulting insoluble residue should weigh not more than 0.005 Gm. (limit of other alkalias). The removal of the water from the amyl alcohol mixture is facilitated by passing a current of air through the hot solution. If 1 Gm. of the salt be dissolved in 20 Cc. of water, and the salicylic acid precipitated by the addition of a...show more

Product details

  • Paperback | 318 pages
  • 189 x 246 x 17mm | 572g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236850793
  • 9781236850799