Diiodomethane or methylene iodide, commonly abbreviated "MI", is a liquid organoiodine compound insoluble in water, soluble in ether and alcohol. It has a relatively high refractive index of 1.741, and a surface tension of 0,0508 N·m-1 Website of Krüss (8.10.2009). Diiodomethane is a colorless liquid, however, it decomposes upon exposure to light liberating iodine, which colours samples brownish. With its high specific gravity, diiodomethane is used in the determination of the densit… (More on Diiodomethane)