A Practical Treatise on the Manufacture of Perfumery. C. Deite
The oil is dextrorotatory, the stearoptene melts at 41° F., and, on adding sulphuric acid, a nearly colorless fluid remains behind: Fennel oil.
3. The oil is perfectly fluid and clear at above 32° F.
I. The oil explodes with iodine, emitting violet vapors.
a. The oil thickens in the air and readily forms resin.
It requires for its solution several volumes of alcohol: Oil of conifers.
b. The oil, on exposure to the air, does not thicken and but slowly forms resin.
α. It is dextrorotatory.
The liquid oil dissolves santalin: Oil of the aurantiaceæ.
The thick oil does not dissolve santalin: Mace oil.
β. The oil is laevorotatory.
The oil shows an acid reaction and dissolves in equal parts of alcohol: Lavender oil.
The oil shows a neutral reaction and dissolves in 12 to 15 parts of alcohol: Marjoram oil.
II. The oil gives no explosion with iodine, but shows an increase in temperature with or without emission of red vapors.
a. The oil shows an acid reaction.
α. The blue or green oil shows the acid reaction only indistinctly: Milfoil oil.
β. The colorless or brown oil gives a turbid fluid with sulphuric acid. It is laevorotatory: Spanish marjoram oil.
The oil is rendered but slightly turbid by sulphuric acid; it acquires a red-violet color by nitric acid, has no effect upon the plane of polarization, and has a peculiar odor: Oil of valerian.
b. The oil is neutral.
α. It dissolves with difficulty in alcohol.
β. The oil is miscible in every proportion with alcohol.
1. It is dextrorotatory.
The oil is colorless or yellowish, it thickens on exposure to the air, and dissolves and reduces fuchsine: Caraway oil.
The oil is thick, yellow-brown or red-yellow, and has a peculiar odor: Calamus oil.
2. The oil is laevorotatory.
It is fluid and has an aromatic odor: Rosemary oil.
The oil is thick and very pungent: Cubebs oil.
III. The oil dissolves iodine without vigorous reaction and without an increase in the temperature.
a. The oil is blue and green.
It has an agreeable, camphor-like odor: Camomile oil.
The green oil thickens in the air and is dextrorotatory: Wormwood oil.
The oil is generally green and produces no effect upon the plane of polarization: Cajeput oil.
b. The oil is colorless or yellow-brown.
α. It separates a solid stearoptene at about 32° F.: Rue oil.
β. The oil remains liquid at several degrees below 32° F.
1. Dextrorotatory oils.
The oil shows an acid reaction, and gives with sulphuric acid a somewhat turbid solution, which becomes clear by the addition of alcohol: Dill oil.
The oil gives with sulphuric acid a yellow-red turbid solution, which becomes clear and peach-blossom red by the addition of alcohol: Eucalyptus oil.
2. Laevorotatory oil.
The oil showing an acid reaction becomes thick in the air and has a characteristic odor: Mint oil.
The oil shows a neutral reaction and has a camphor-like odor: Thyme oil.
IV. The oil does not dissolve iodine, does not heat with sulphuric acid, and does not react upon nitric acid. The odor is empyreumatic: Petroleum.
B. The oil is specifically heavier than water.
1. The oil shows an acid reaction.
It is soluble in 30 parts of water, boils at 356° F., and smells of bitter almonds: Oil of bitter almonds.
The oil has an agreeable, sweet odor and boils at from 392° to 431.6° F.: Wintergreen oil.
2. The oil shows a neutral reaction.
a. The oil is laevorotatory.
It becomes blue by the addition of sulphuric acid: Oil of cloves.
b. The oil is optically inactive.
The thick oil gives with sulphuric acid a turbid, black-brown fluid; the odor is agreeable: Cinnamon oil.
c. The oil is dextrorotatory.
The thick oil has an agreeable odor: Sassafras oil.
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