According to Claisen,5) benzyl benzoate can be prepared by dissolving l 1/2 g. of sodium in the requisite amount of benzyl alcohol to effect solution. 200 g. of benzaldehyde are then added and the mixture heated for several days on a water bath. The reaction product is acidulated with glacial acetic acid, the oil thrown out of solution with water and destilled.
1) S. Cannizaro, Liebig's Annalen 88 (1853), 130. 2) Journ. f. prakt. Chem. 39 (1889), 162. 3) Berl. Berichte 19 (1886), 355. 4) Berl. Berichte 32 (1899), 744. 5) Berl. Berichte 20 (1887), 649.
Benzyl benzoate is a somewhat viscid colorless liquid which is difficultly volatile with water vapor and possesses a faint odor. A ta low temperature it congeals to white crystals which melt again at about 20°. Claisen1) records the following properties:
M. p. 21°; b. p. 323 to 324°; d19o 1,1224 (liquid).
In the laboratory of Schimmel & Co. the following constants have been observed:
M. p. 19 to 20°; b. p. 156° (4,5 mm.); d15o 1,121 to 1,125; nD20o 1,569 to 1,570; soluble in 10 vol. of 80 p. c. and in 1,5 to 2 vol. of 90 p. c. alcohol.
In perfumery benzyl benzoate finds extensive application as solvent and fixing agent for other more volatile perfumes. Thus, e. g. it is used in making concentrated solutions of artificial musk.