LogP | 3.1 at 23℃ |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
Overview | citronella nitrile has fresh lemon fruit aroma and green tea aroma, which can be used as a daily essence, Gulong type perfume. |
Product description | citronella nitrile almost colorless liquid; Fresh lemon fruit aroma and green vegetable and soil aroma, natural power, soluble in 6 volume 70% ethanol and oil, soluble in O-phthalic methanol ethyl ester, insoluble in water. Citronella nitrile is the preparation of citrus flavor of a good spice, can be used to stabilize the lemon flavor, more suitable for lemon and Gulong flavor. Can be well coordinated with the "Ligustrum aldehyde", dihydrolauryl alcohol. Slightly used to enhance fresh gas. It can also be used to enhance the flavor based on the leaf nitrile, giving a more natural and more similar to the flavor of citral. General dosage of 0.5~3%, also can reach 10%. In strong acid medium (pH = 0.5~2) is not stable, in weak acid and alkaline medium is more stable, found no cause discoloration factors. Since citronella nitrile does not exist in nature, it is necessary to prepare citronella nitrile by chemical synthesis. |
synthetic method | citronellonitrile was synthesized from lemon eucalyptus oil by oximation and dehydration. |
storage | citronella nitrile should be sealed and stored in the dark. |
Application | citronellonitrile is superior to citronellal in heat, light and acid-base stability, and the aroma is milder than citronellal, more durable and transparent, so citronella nitrile can not only be used as a substitute for citronellal, and its application range is wider, mainly used for the preparation of cosmetic flavor. In the deployment of aromatic nitrile flavor, the addition of citronella nitrile can improve the aroma, giving the flavor more natural and more similar to the flavor of citral. Citronella nitrile can be well coordinated with the dihydrolauryl alcohol and the Ligustrum aldehyde, to enhance the flavor of the fresh aroma. In the deployment of lavender, gardenia, citrus, Magnolia, Longevity flower, honeysuckle, Gulong, bodhama, Bast, Hyacinth and other fragrance, citronella nitrile is an essential spice, it is mainly used for Perm liquid, detergent, soap and other cosmetic essences. |
preparation | add 108g of acetic anhydride to a three-neck reaction flask with a thermometer, stirrer, dropping funnel and reflux condenser, heat to 90 °c with stirring. Under the condition of this temperature, 120g of citronella aldoxime was slowly added dropwise through a dropping funnel. After the addition was completed, the temperature was raised to 100 ° C., and the reaction was continued for 2 hours with stirring, thereby completing the reaction. Acetic anhydride and acetic acid in the reaction mixture were recovered by distillation with water under reduced pressure. After the reaction mixture was cooled, it was poured into a separatory funnel, and the reaction mixture was washed 3 to 5 times with an appropriate amount of water, and the aqueous layer was separated. Finally, the reaction mixture was subjected to vacuum fractionation with a rotary vane vacuum pump of type 2XZ-1, and the 90 ° C./0.667kPa fraction was collected to obtain about 75g of citronella nitrile product, which had typical characteristic aroma of citronella nitrile. |
Use | is a kind of good flavor of citrus flavor, which can be used to stabilize lemon flavor, more suitable for lemon and Gulong flavor. General dosage 0.5%-3%. |