Chemistry of Essential Oils

24 THE CHEMISTEY OF ESSENTIAL OILS

TURPENTINE FROM PINUS SABINIANA.

The oil had a pleasant orange-like odour; specific gravity, 0*6971;

and index of refraction, 1-3903. On fractional distillation of 500 grams

of the oil the following results were obtained :—

Temperature

(corrected).

°C.

96-1-97*3

97-9

98-3

98-3

98-4

98-4

98-5

98'5

98'5

98-5

98-6

98-7

98-8

98-8 +

Distillate

Observed.

Per Cent.

4-24

7-93

9-04

8-44

8-89

8-97

8-06

7-13

6-92

6-94

6-83

6-19

5-66

4-66

Cumulative.

Per Cent.

4-24

12-17

21-21

29-65

38-54

47'51

55-57

62-70

69-62

76-56

83-39

89 -58

95-24

99-90

Specific

Gravity at

15° C.

0-6889

•6885

-6882

•6882

•6880

•6881

•6881

-6882

•6881

•6880

•6879

•6879

•6881

•7393

XD15-

Index of

Refraction

at 15° C.

1-3890

1-3898

1-3898

1-3898

1-3898

1-3898

1-3898

1-3898

1-3898

1-3899

1-3899

1-3899

1-3900

1-4140

This oil is very noteworthy, as it consists almost entirely of the hydro-

carbon heptane, a low boiling paraffin hydrocarbon, quite distinct from

the terpenes, which are the normal constituents of practically all other

turpentine oils.

TURPENTINE FROM PINUS OONTOBTA.

Two samples of this oil had the following characters :—

Specific gravity

Rotation.

Refractive index

1.

0-8518

• 20-12°
  1-4862

2.

0 8549

1-4860

About 400 grams were submitted to fractional distillation with the

following results:—

Temperature

(corrected).

°C.

164-4-170 6

171-6

172-6

173-6

175-3

177*2

177-6

177-9

178-4

178-9

178-9 +

Distillate.

Observed.

Per Cent.

2-89

8-55

9-08

10-77

10-22

9*79

10-03

10-23

9-26

4-15

14'83

Cumulative.

Per Cent.

2-89

11-44

20-52

31-29

41-51

51-30

61-33

71-56

80-82

84-97

99-80

</15°

Specific

Gravity at

15 ° C.

0-8547

•8546

•8542

•8534

•8522

•8514

. -8507
•8502
•8498
•8498
—

ND5°

Index of

Refraction

at 15° C.

1-4793

1-4814

1-4823

1-4835

1-4852

1-4861

1-4871

1-4880

1-4891

1-4894

—