Iodine solubility. Series of test tubes testing solvent action on iodine. From left to right: cyclohexane & iodine, water & iodine, water & cyclohexane, and water & cyclohexane with iodine. Iodine dissolves readily in cyclohexane, a non- polar solvent, to form a purple solution. Iodine does not readily dissolve in water, a polar solvent. Also seen is the immiscibility (non- mixing) of cyclohexane and water. The test tube at far right shows how the solutions have separated to form two distinct layers.