Ethyl iodide is commonly known as Iodo ethane, having Molecular formula C2H5I, Mol. Wt.155.97 gmol.It is a Primaryhalogeno- alkane compound in which one Hydrogen atom in an alkane (like Ethane) is replaced by a halogen atom (ie. Iodine atom). It represents the category of Organo iodide compounds, with the presence of one CarbonIodine bond. CAS No. of Ethyl Iodide is 75-03-6. Ethyl iodide is a dense, colorless transperrent, flammable liquid . It is sensitive to light and on exposure to light turns slight reddish due to liberation of Iodine. It has a boiling point (B.P. 72.3-72.4 c), Sp. Gr. at 20C; 1.9 1.93 gmcc. It is slightly soluble in water, [solubility in water 0.4 g100ml at 20 c], it is completely miscible with Ethanol.