Propylene chlorohydrin usually refers to the organic compound with the formula CH<sub>3</sub>CH(OH)CH<sub>2</sub>Cl. A related compound, an isomer, is CH<sub>3</sub>CH(Cl)CH<sub>2</sub>OH. Both isomers are colorless liquids that are soluble in organic solvents. They are classified as chlorohydrins. Both are generated on a large scale as intermediates in the production of propylene oxide.
The reaction of aqueous solution of chlorine with propene gives a 10:1 ratio of CH<sub>3</sub>CH(OH)CH<sub>2</sub>Cl and CH<sub>3</sub>CH(Cl)CH<sub>2</sub>OH. These compounds are treated with lime to give propylene oxide, which is useful in the production of plastics and other polymers.