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
Lavandula oil, and its major constituent linalyl acetate, are toxic to human skin cells "in vitro," contact dermatitis to lavender oil appears to occur at only a very low frequency." There are two reports on a total of six cases of gynecomastia in prepubertal boys who were exposed to topical lavender essential oil. A 2007 study examined the relationship between various fragrances and photosensitivity, stating that lavender is known "to elicit cutaneous photo-toxic reactions", but does not induce photohaemolysis. Flower spikes are used for dried flower arrangements. The fragrant, pale purple flowers and flower buds are used in potpourris. Lavender is