Citronellol is the most commonly used fragrance, most suitable for rose fragrance, can also be used as a citrus flavor and many citronellol ester raw material, and can be used in the manufacture of hydroxydihydrocitronellol and then hydroxydihydrocitronellal. Citronellol is an indispensable raw material for preparing various rose fragrances and can be used in almost all cosmetics. As a food spice, according to the provisions of the Japanese "Food Additives Public Order", the purity is required to be above 94%, and it cannot be used for purposes other than flavoring. It can be used to make geranyl or citronellal, and also used as insecticide, mosquito repellent and soap flavor; Widely used in the preparation of perfume, soap and cosmetics fragrances; It is the base aroma of rose essence, and it is also commonly used to sweeten flower fragrance, such as used in lily of the valley, lilac, osmanthus and other fragrances. It is a kind of heavy and floral flavoring, often mixed with geraniol, geraniol and phenylethanol to form roseyl. It can also be used for rose, strawberry, raspberry and other berries, citrus fruit, peach and other edible flavors.