Chemical properties: Colorless liquid. The melting point is -56.5℃, the boiling point is 166.2℃, 45.5℃ (1.33kPa), the relative density is 1.3359 (20/4℃), and the refractive index is 1.4957. Flash point 62℃. Miscible with ethanol, ether, acetone, benzene and carbon tetrachloride, insoluble in water. It has a pungent smell.

Preparation: 0.1mol potassium bromide, a certain amount of cyclohexanol and deionized water were added into a grinding triangle bottle with a reflux condensing tube, heated on a magnetic heating agitator, and slowly added concentrated sulfuric acid after stirring,20min. After reflux reaction for a certain time, stop heating, add 30mL water from the mouth of the condensing pipe, so that all the salt generated in the reaction bottle is dissolved in water, pour the material in the reaction bottle into the liquid separation funnel, wash the organic phase with saturated sodium bicarbonate solution, and then wash with water to neutral, and obtain crude products, no by-products were analyzed by gas chromatography; The crude product was dried with anhydrous magnesium sulfate, and the fraction of 166℃ ~ 167℃ was collected to obtain the light yellow liquid product bromocyclohexane.