Cinnamic acid ethyl ester is one of the more rarely occurring constituents of volatile oils. Its occurrence is restricted to the oils of kaempferia and storax. Artificially it is obtained by passing hydrogen chloride gas into the alcoholic solution of cinnamic acid. The ester is a liquid which has a pleasant odor, congeals at lower temperature, is optically inactive and possesses the following additional properties:

1) Linnemann, Liebig's Annalen 160 (1871), 208.

2) Kopp, Ibidem 94 (1855), 309.

3) Journ. chem. Soc. 69 (1896), 1176.

4) v. Schneider, Zeitschr. f. physik. Chem. 19 (1896), 158.

M. p. 12V) b. p. 271°;2) d01,0656,d20.oo 1,0498;3) B. p. 195,5° (103 mm.); d15,1,0546.4)

In connection with technical products Schimmel & Co. observed: d15 1,053 to 1,055; nD20o 1,559 to 1,561; soluble in 5 to 7 vol. of 70 p. c. alcohol.