4. According to the physical and chemical properties of citronellol, there are 4 kinds of monochlorine substitutes, which are compounds with only one chlorine atom in the molecule. Citronellol is an organic matter, chemical formula for C10H20O. has a bitter taste, slightly soluble in water, soluble in ethanol and most non-volatile oils and propylene glycol, insoluble in glycerol, is extremely hazardous to water, toxic to fish. Natural essential oils contain right or left citronellol and its racemate.