When ethanol and propanone are heated with alkali and iodine, the compound formed is referred to as iodoform, and the reaction by which it is formed is known as the haloform reaction. When ethanol is heated in the presence of alkali NaOH and Na2CO3 with iodine at about 60°, iodoform is produced.When propanone is heated in the presence of alkali NaOH and Na2CO3 with iodine, iodoform is produced.