Property: Iodine is purple black granular or scale flaky crystal with metallic luster and special odor, toxic, corrosive, specific weight 4.93，melting point 114.2 degree，boiling point 184 degree，soluble in alcohol, carbon disulfide, chloroform, ether, glycerol, carbon tetrachloride, easily soluble in iodide, slightly soluble in water. Liquid iodine is an excellent solvent, it is soluble in sulfur, alkali metal iodide, aluminum, and other organic compound.