Isoeugenol (4-propenyl-2-methoxyphenol, molecular formula C10H12O2) is a light yellow slightly thick liquid, insoluble in water and glycerol, soluble in ethanol and other organic solvents; It has a soft and sweet spicy fragrance, fragrant caryophyllum and lilac flowers; It is mainly used for the preparation of flavor and vanillin, which can be used to prepare essential oils such as ylang ylang and nutmeg; It can also be used to prepare food flavors with hook, peach, spicy and clove flavors; It is also the raw material of semi-synthetic vanillin. The structure of isoeugenol exists in cis and mode, but because cis-isochemicalbook eugenol has certain toxicity, it is generally required that its cis-proportional ratio in cis- and trans- mixtures should not be higher than 10% when used as a commodity. Isoeugenol is phenyl propene, the guaiacol replaced by propylene. This is phenylpropane that is found in essential oils of plants such as ylang-ylang ylang (Canangaodorata). Using eugenol as raw material can synthesize vanillin and is used in the production of vanillin. It can be a cis (Z) or trans (E) isomer. Trans (E) isoeugenol is crystalline, and cis(Z) isoeugenol is liquid.