Chemistry of Essential Oils

ROSACES

GERMAN OTTO OF ROSE.

Specific gravity

»> »< .....

Rotatory power ....

Congealing-point ....

Stearoptene-conteDt ....

Acid number .....

Saponification number.

,, „ after acetylisation.

„ ,, „ formylation

Calculated from these figures—

Total alcohols C 10 H 18 O.

Citronellol in the formylation product

HUNGARIAN OTTO

Specific gravity at 30

°

.

Refractive index at 20°

1.

Germaii Oil,

Miltitz, 1900.

at 40°

0-8372

at 30°

0-8438

at 30°

• 0° 44'

• 290°
  28-50 per cent.
  2-3
  4-5
  188 7
  59-21
  6044 per cent.
  16-49
  OF ROSE.

SPANISH OTTO OF ROSE.

Samples distilled in Chinchilla have

following characters :—

Optical rotation ....

Refractive index at 25°

Melting-point .....

Acid value ......

Eatei ,,.....

Total alcohols .....

399

2.

German Oil,

Miltitz, 1900.

at 40°

0-8304

at 33°

0-8360

at 33°

• 0° 52'
  
  
  • 30-0°
    39-97 per cent,
    0
    10-4
    171-14
    47-9
    54*00 per cent^
    13-34
  
  
  
  

. 0-8471

. 1-4661

; been examined and show the

•

0-825 to 0-845

• 1° „ - 3°
  1-4520 „ 1-4568
  25° „ 29°
  3 „ 5

(^9) „ 12

. about 45 per cent.

RUSSIAN OTTO OF ROSE.
A sample distilled from flowers grown in the Imperial Appanages of
Kachetie (Caucasus) which had been cultivated from Bulgarian cuttings,
and has been examined by Roure-Bertrand Fils,^1 had the following
characters:—
Specific gravity at 30°
Optical rotation
Solidifying-point
Liquefying point
Stearoptene
Acid value
Ester „.
,, as geranyl acetate
,, value of acetylated oil
Total alcohols.
Gitronellol
Geraniol ....

0-8368

-4° 16

23°

25°

33-5 per cent.

5-7

4-7

1

• 66 per cent.
  157-2
  49-6 per cent.
  34
  15-6
  That is, the total alcohols contained 68'5 per cent, of citronellol and 31-5
  per cent, of geraniol.
  An otto of rose distilled in the Caucisus has also been examined
  very fully by the same firm, who found it to have the following char-
  acters :—
  1
  Report, October, 1902, 23.