Chemical Abstracts Volume 5, No. 1

Chemical Abstracts Volume 5, No. 1

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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. 1911 edition. Excerpt: ...a striking red color which appears gradually in cold, rapidly in hot solns. Viewed by transmitted light, the color is green. KOH produces in EtOH soln. an intense red color which disappears on acidifying. The cannabinol content of a drug may be detd. by feeding a petroleum ether extract of about i g. to a dog or cat and noting the beginning of the intoxication. Herbivorous animals are not suitable for the experiment. V. K. Chesnut. Methyl Alcohol and its Detection. A. Bukowski. Pharm. Post, 43, 129-32; through Chem. Zentr., 1910, I, 1645.--A brief review is first given of cases of poisoning by MeOH, which is often used as a substitute of EtOH in pharm. preps, in Russia. The most exact method of identification is that of Riche and Brady which is based on the formation of methyl violet. A simplified method is used by the author: To 2-3 cc. of the distillate from the soln. add about 10 cc. 15% H, SO4, cool in ice, and gradually add 0.8 to i g. of pulv. KMnO, . Filter the reddish soln. immediately after the first excess has been added. The color disappears on warming. Formaldehyde is present in this soln. if the original soln. contained MeOH. The Kenntmann and Mentzel tests are recognized as reliable. In the former stratify i cc. of a soln. of 0.25 g. morphine chloride in 10 cc. cone. H, SO4 under i cc. of the soln. A violet ring is formed; in the latter dissolve about o.oi g. phenylhydrazine-HCl in i cc. of the filtrate and add a few drops of a 10% FeCl, soln. and 10-15 drops of cone. HjSO4. A canninred color is formed if formaldehyde be present. The K test will detect 5% of MeOH. The author tested 105 preps, (children's balsam, I tinctures, spirits of camphor, arnica tincture, essence of peppermint, etc.), 85 of which contained MeOH. V. K. C....show more

Product details

  • Paperback
  • 189 x 246 x 46mm | 1,597g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236877039
  • 9781236877031