Chemistry of Essential Oils

188 THE CHEMISTEY OF ESSENTIAL OILS

• 14°. The a-santalol prepared from it boils at 159° (10 mm.), has a
  density of 0979, optical rotation + 11°, and refractive index 1499 (19°).
  The strychnine phthalate of /3-santalol melts at 134° to 135°, and has an
  optical rotation of - 3043°. The /?-santalol prepared from it boils at
  168
  °
  to 169° (10 mm.), has a density of 09729, optical rotation - 42°,
  and refractive index 1-5092 (19°).

12. Santalal, C 15 H 22 O, has been reported as a constituent of santal
    oil, but its presence is doubtful.


13. Teresantalic Acid.—This body exists in very small amount in
    santal-wood oil. It forms part of the small quantity of free acids
    present, and has the formula C^H^Og. It forms well-defined prisms
    melting at 157°, and, according to Miiller, boils at 150° at 11 mm. Its
    specific rotation in alcohol solution is - 70° 24'. It exists in the free
    state in the oil to the extent of 0*5 per cent., and can be extracted by
    means of dilute caustic alkali solution.


14. Santalic Acid.—This acid, of the formula C 15 H«52 02 , is a second
    of the free acids isolated from santal-wood oil. tt is, according to
    Guerbet, a thick liquid boiling at 210° to 212° at 20 mm. pressure.
    In addition to the above-described oil, the following santal oils, or
    so-called santal oils, have been examined:—

NEW HEBRIDES OIL.

This is probably not distilled from Santalum album. It has the

following characters:—

Specific gravity. 0*9675

Optical rotation - 1° 2'

Eefractive index 1-5089

Acid value ......... 1-8

Ester , 3-6

Santalol 92-4 per cent.

TAHITI OIL.

This oil is probably distilled from Santalum Freycinetianum and has

the following characters :—

Specific gravity. ...0-9748

Optical rotation - 8° 29'

Eefractive index 1-50848

Acid value 2-0

Ester „. 5-1

Santalol. 94

• 4 per cent.

NEW CALEDONIA OIL.
This oil is obtained from Santalum austro-caledonicum. It has the
following characters:—
Specific gravity 0-9647 to 0'978
Optical rotation + 6° 29' „ - 21
°
42'
Befractive index 1-5062
Acid value 0-9 to 6-4
Ester „,, 3-2 „ 5-4
Santalol 90-5 to 96-2 per cent.

FLGI OIL.

This oil is obtained from the wood of Santalum Yasi. It has a
specific gravity 09768 and optical rotation - 255°.