Rose oil in geraniol, the main constituent of rose oil. Some of these "rose oils" are up to 90% geranium or palmarosa to 10% rose. This is referred to as "extending" the rose fragrance. This may be done to compensate for chemotype, e.g. Bulgarian distilled rose oil is naturally low in phenylethanol, and Ukrainian or Russian rose oil is naturally high in phenylethanol. Pure rose oil should not be used directly on the skin, as it can cause allergic reactions such as red skin and spots. Rose oil Rose oil (rose otto, attar of rose, attar of roses or rose essence) is
Essential oil Estimates of total production of essential oils are difficult to obtain. One estimate, compiled from data in 1989, 1990, and 1994 from various sources, gives the following total production, in tonnes, of essential oils for which more than 1,000 tonnes were produced. The medical value of essential oils is the subject of ongoing research, and varies among species, presence or absence of active compound(s), route of administration, potency, and dosage. Some may be inappropriate for persons with certain medical conditions or who take certain prescriptions or over-the-counter (OTC) medications. Taken by mouth, many essential oils can be dangerous in high