Family: Rutaceae.

The fruits of Xanthoxylum piperitam, DC. (family Rutaceae) known as Piper japonicum (Japanese sansho) yield 3,16 p.c. of a volatile oil when distilled with water vapor. It is of a yellow color and has a pleasant odor reminding of lemons. d15o 0,973; boiling temperature 160 to 230°.

The principal constituent of the oil is citral C10H16O4).

An oil distilled by j. Stenhouse5) and presumably derived from Xanthoxylum piperitum, was obtained from X. alatum as was demonstrated later6). (See p. 628.)

1) Arch, der Pharm. 234 (1896), 608.

2) Apotheker Ztg. 23 (1908), 279.

3) Beitrage zur pharmakognostischen und chemischen Kenntnis des Harzes und Holzes von Guajacum officinale, L. sowie Palo balsamo. Inaug. dissert. Strasburg 1901.

*) Report of Schimmel & Co. October 1890, 61.

5) Pharmaceutical Journ. 1.17 (1857), 19. - Liebig's Annalen 104 (1857), 236. 6) Hanbury, Science Papers p. 229. - E. M. Holmes, Perfum. and Essent. Oil Record 3 (1912), 37.

Wartara Oil