Source: https://chestofbooks.com/health/aromatherapy/The-Volatile-Oils-Vol2/142-Andropogon-Oils-Of-Unknown-Species.html
Timestamp: 2019-04-24 21:57:04+00:00

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An oil obtained from an Andropogon species cultivated in the Botanical Garden of Buitenzorg (Java) has been examined by Schimmel & Co.6). As to appearance and odor it resembled palmarosa oil, but had a much lower geraniol content: d16o0,9411; aD - 3° 16'; A. V. 1,9; E. V. 24,9; E. V. after acetylation 144,5 corresponding to 44,6 p.c. of total geraniol. In alcohol the oil was but imperfectly soluble: the clear solution obtained with 2,3 vols, of 70 p.c. alcohol became turbid upon the addition of more solvent; even with 90 p.c. alcohol the dilute solution was turbid. This poor solubility as well as the very high specific gravity are probably attributable to resinification, for the oil rectified with water vapor formed a clear solution with 1 vol. and more of 70 p.c. alcohol.
1) Report of Schimmel & Co. April 1892, 59.
2) Jaarb. dep. landb. in Ned.-Indie, Batavia 1910, 49.
3) Report of Schimmel & Co. April 1911, 19; October 1911, 20. 4) jaarb. dep. landb. in Ned.-Indie, Batavia 1907, 67.
6) Report of Schimmel & Co. October 1908, 72.
Apparently the oil mentioned in the annual report of Buiten-zorg for 1906, p. 46, was obtained from the same species of Andropogon: d20o 0,991 (!); aD26o - 2°50'; S. V. 18,7; S. V. after acetylation 157.
Schimmel & Co.1) have examined a second oil from Buitenzorg which was obtained from a new, also unknown species of Andro-pogon, probably from the same plant mentioned in the report2) of the botanical institute there. The oil was light yellow in color. Its odor was peculiar, reminding one simultaneously of fatty aldehydes and geraniol or methylheptenone: d15o 0,9961; aD - 2°; nD20o 1,51236; A. V. 3,6; E. V. 7,3; soluble in 1 vol. of 80 p.c. alcohol, the solution becoming turbid upon the addition of 3 vol. and more of solvent. The oil reacted with sodium bisulphite. Decomposed with soda solution, the addition product yielded a fatty aldehyde, which is possibly identical with decylic aldehyde, but which could not be further investigated as the amount of oil was too small.

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