The organic constituents of plants and vegetable substances and their chemical analysis / by G.C. Wittstein ; authorised translation from the German original, enlarged with numerous additions, by Baron Ferd. von Mueller.
- Date:
- 1878
Licence: Public Domain Mark
Credit: The organic constituents of plants and vegetable substances and their chemical analysis / by G.C. Wittstein ; authorised translation from the German original, enlarged with numerous additions, by Baron Ferd. von Mueller. Source: Wellcome Collection.
Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.
65/362 page 41
![at 40° to dryness. The remaining Cerealin is similar to albumin, amorphous, nitrogenised, soluble in water, insoluble in alcohol, ether and oils. The aqueous solution curdles at 75°, and at the same time the C. loses its activity. Ceropinic Acid = C36 H34 05. In the bark of Pinus sylvestris. Obtained in the same manner as indicated under Pinocorretin, and purified by recrystallising in alcohol with aid of animal charcoal. White powder, consisting of microscopic crystals, fuses at 100° and congeals like wax. Cerosill = C48 H50 0 2. Wax-like substance which forms on the surface of the stalks of the sugar-cane (Sacchai’um officinarum) and is easily collected by scraping. To purify it, digest first with cold alcohol, dissolve afterwards in boiling alcohol and allow to crystallise. It forms pale-yellow light laminae of mother-of- pearl lustre, without odour and of 0*961 sp. gr., is hard, easily friable, fuses at 82°; insoluble in water and cold alcohol, readily soluble in boiling alcohol and congealing, when cold, to an opodeldoc-like mass; insoluble in cold, slowly soluble in hot ether, ■combines slowly with alkalies. Ceroxylin or Ceroxylon Resin = C40 H32 0 2. It is contained in the Palm-wax, obtained by scraping the stem of Ceroxylon Andi- cola and boiling the substance with water. It is obtained pure by boiling the Palm-wax with alcohol, filtering while hot and allowing the liquid to cool. The wax is then removed and the mother-ley •evaporated to form crystals. The crystallised resin appears in white, fine needles, melts above 100°, dissolves little in cold, readily in hot alcohol, also in ether and volatile oils, y CetTiiric Aci(l=C3Q H]^ Oiq. In the Iceland-moss (Cetraria Islandica). Boil with alcohol under addition of carbonate of potash, strain, precipitate the decoction with diluted hydrochloric acid and water, and remove from the deposit foreign matters as lichenostearic acid, thallochlor, &c., by successively treating with boiling alcohol of 42% and ether, mixed with oil of rosemaiy or camphor. From the remaining grey-white mixture of Cetraric acid and an indifferent white compound, the former is dissolved by a -cold aqueous solution of bicarbonate of potash, and has to be precipitated with hydrochloric acid and recrystallised in the least possible quantity of boiling alcohol.—Snow-white, loose tissue of shining, hair-shaped needles, very bitter, not volatile, loses at 100° nothing of its weight, turns brown at 125° and decomposes; does not dissolve in water, but imparts to it a faint, bitter taste when boiled; is slowly soluble in cold, readily in boiling alcohol, little in ether, not in oils; most readily in the hydrates and carbonates of -alkalies; the bright-yellow solutions have a very bitter taste, and •are precipitable by acids.](https://iiif.wellcomecollection.org/image/b21957927_0065.jp2/full/800%2C/0/default.jpg)
