Benzoin is so viscous that this is not possible and the oil is simply a resinoid that has been dissolved in a suitable liquid. Once a principal method of extraction from flowers, this method is virtually obsolete today. The fat becomes saturated with the aromatic oils which can then be dissolved out with alcohol. The fragrance-saturated fat is known as a pomade . The alcohol extractions are known as absolutes .
Liquid is the most common form at room temperature.
Essential oils dissolve in alcohol, fats and other oils but not in water. Contrary to popular belief, they are not oily to touch. Being of a volatile nature, they evaporate on exposure to air and do not leave an oily residue. Interaction with the Human Body Essential oils can be absorbed by the human body in a variety of ways. The vapour, once inhaled, can trigger neurochemical release in the brain via receptors in the nose and mouth.