The aromatic odor of the fresh leaves of Juglans regia, L. (family Juglandaceae), is due to a volatile oil which they contain. Upon distillation, fresh German leaves yield 0,0122) to 0,029 p.c.3) of a yellowish-green to brown oil, with a tea- and ambra-like odor, and which upon cooling separates paraffin or becomes solid. d30o 0,90372) to 0,91374); aD inactive4); A.V. 9,34) to 16,8; E.V. 18,42) to 274). It is soluble in 90 p.c. alcohol with the separation of paraffin which, after repeated recrystallization from alcohol, melts at 61 to 62°.
Of somewhat different behavior, especially as to its optical rotation, was an oil distilled by Schimmel & Co.4) in Barreme, southern France. The oil which separated spontaneously from the aqueous distillate was examined by itself, as was also the oil obtained by shaking out the aqueous distillate with ether, finally the total product was obtained by pouring the two oils together.
83°/o Principal oil .
17 °/o Cohobated oil
100% Total oil . .
1) Report of Schimmel & Co. October 1890, 61.
2) H. Haensel, Chem. Zentralbl. 1907, II. 1620.
3) Report of Schimmel & Co. October 1890, 61.
4) Ibidem April 1912, 131.