The Modern Formulary; A Text Book of Chemistry as Applied to the Manufacture of Proprietary Specialties

The Modern Formulary; A Text Book of Chemistry as Applied to the Manufacture of Proprietary Specialties

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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: ...Talc is most economically applied as follows: Spread the granules in a thin layer on paper, and sift the talc over the surface, using a very fine sieve; mix thoroughly by lifting the corners of the paper, and complete by rotating in a large flask or bottle. In case of adhesion the punches should be washed with water, the lower punch being first removed for the purpose. If the punches are not kept well polished the difficulty will frequently arise from that cause; when not in use they should be immersed in liquid paraffin or paraffin oil. As a result of further experimenting on iron tablets, the following formula has been adopted as a substitute for pilula ferri, B. P.: l. Dried Ferrous Sulphate.............150 parts Gum Acacia....................... 25 parts Sugar.............................125 parts Theobroma Emulsion (Acacia)...... 60 parts Granulate and dry thoroughly by the application of heat. II. Sodium Bicarbonate................150 parts Theobroma Emulsion (Acacia)....... 35 parts Granulate and dry thoroughly with heat, and mix two parts of I with one part of II. Each 5-grain tablet yields on moistening 1 grain of ferrous carbonate. Theobroma emulsion, prepared with gum acacia, is preferable in this case to one made with soap; the above calculations are based on one giving a 40 per cent. residue on drying. Absolute drying of the granules is necessary, otherwise the reaction between the salts takes place to some extent, and oxidation ensues. Tablets made from the above formula have been exposed for three months to the trying atmosphere of the general laboratory, without any further change than a slight discoloration of the edges; some of the same batch were coated and have kept perfectly. If it is wished to obviate the labor of...show more

Product details

  • Paperback | 148 pages
  • 189 x 246 x 8mm | 277g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236824199
  • 9781236824196