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.