The oil distilled from the root bark of the cinnamon shrub is a colorless liquid with a strong odor of camphor. Upon standing, even at room temperature, some of the camphor2) separates out. This is identical with the ordinary laurus camphor. This fact has long been known, having been mentioned by Trommsdorff3) as well as by Dumas and Peligot4). A further constituent of the oil is cinnamic aldehyde5).
The latest examination of the oil was conducted by A. A. L. Pilgrim0). The properties of the oil distilled from the fresh root bark were as follows: d15o 0,99366 and aD + 50,2° (?). The presence of the following constituents was established: pinene, dipentene, phellandrene, ]cineol, camphor, eugenol, safrol, caryophyllene and borneol.
Cinnamomum zeylanicum affords the interesting example of a plant of which roots, leaves and bark yield oils very different in composition. In the root oil camphor is found as characteristic constituent, leaf oil contains principally eugenol, whereas in the the bark oil cinnamic aldehyde predominates.
1) Report of Schimmel & Co. October 1902, 27.
2) Ibidem October 1898, 47.
3) Trommsdorff's Handbuch der Pharmacie. 1827, p. 666.
4) Liebig's Annalen 14 (1835), 50.
5) Holmes, Pharmaceutical Journ. III. 20 (1890), 749.
6) Pharm. Weekblad 46 (1909), 50; Chem. Zentralbl. 1909, I, 534.