Onion Oil
Title: Onion Oil
Literature References: Obtained from crushed onion seeds, the seeds of Allium cepa L., Liliaceae: Loew, Ind. Quim. 10, 5 (1948); Phadnis et al., J. Univ. Bombay 17A, no. 24, 62 (1948). Contains allylpropyl bisulfide, S-(1-propenyl)cysteine sulfoxide and 1-propenylsulfenic acid which is thought to be the lacrimator in onions: Virtanen, Sprare, Suom. Kemistil. 35B, 28, 29 (1962); Chem. Ztg. 86, 816 (1962).
Properties: Pale yellow oil. Strong odor of onions. d415 0.9289. Solidifies at -15°. nD25 1.4730. [a]D20 -1.5°. Sol in ether, chloroform, carbon disulfide.
Optical Rotation: [a]D20 -1.5°
Index of refraction: nD25 1.4730
Density: d415 0.9289

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