Chemistry of Essential Oils

434 THE CHEMISTRY OF ESSENTIAL OILS

(b) Soluble Essential Oils.

Density at 15° C

Index of Refraction nd

15

Rotatory Power (1 = 100 mm.) ....

Solubility in 80 per Cent. Alcohol

Acid Value .....

Coefficient of Saponification ....

Total Esters (as Linalyl Acetate)

Coefficient of Saponification of the Acetylated

Oil.

Total Alcohols (as Linalol) ....

Methyl Anthranilate ......

M*y.

0-9434

1-498

- 1° 46'

1 vol. and over

0-7

61-6

21-5 per cent.

164-7

51*6 per cent.

13-2

Autumn.

0-9124

1-483

- 3° 20'

1 vol. and over

1-05

58-8

20*6 per cent.

173*7

54*8 per cent.

12-4 „

(c) TotalEssential

Density at 15° C....

Index of Refraction wd^15.

Rotatory Power (I = 100 mm.).

Solubility in 80 per Cent. Alcohol

Acid Value ....

Coefficient of Saponification

Total Esters (as Linalyl Acetate)

Coefficient of Saponification of the

Oil

Total Alcohol (as Linalol).

.

Acetylated

Methyl Anthranilate...

Oils.

May.

0-8899

1-478

- 0° 48'

1 vol. and over

0-7

70-2

24-6 per cent.

163-1

51-0 per cent.

3-53 „

Autumn.

0-8887

1-476

. - 4° 6'

1 vol. and over

1-0

95-8

33-4 per cent.

179-5

57-0 per cent.

2-74 „

Spanish neroli oil differs in character from the French distillate.
The figures for two typical samples examined by Umney
l
are as follows:—

SPANISH NEROLI OIL.

(Distilled at Alora.)

Specific gravity -860

Optical rotation4- 25°

Esters 10*9 per cent.

Solubility 1 in 1 vol. of 90 per cent, alcohol. Not soluble in 80 per

cent, alcohol.

SPANISH NEROLI OIL.

(Distilled at Malaga.)

Specific gravity.

Optical rotation

Esters

•861

+ 24°

8-2 per cent.

Solubility 1 in 1 vol. of 90 per cent, alcohol. Not soluble in 80 per

cent, alcohol.

Spanish neroli oils examined by Schimmel gave the following re-

sults :—

(^1) P. wid E.O.R. (1913), 137.