Iodine Solid Colour, Mp: 133. Elemental iodine is a dark grey solid with a faint metallic luster. When heated at ordinary air pressures it sublimes to a violet gas. 5 °C, bp: 185 °C. But while sublimation, it will convert into purple or violet gas. But, A solution of iodine (I2) in water has a light orange-brown color. . Under standard temperature and pressure conditions, elemental iodine The Color of Solid and Gaseous Iodine In its pure, elemental state, solid iodine exists as crystalline purplish-black or grayish-black crystals at room temperature. The solid iodine is a dark, almost black, grey or purple color. Iodine forms Iodine is a chemical element with symbol I and atomic number 53. omu, exx, kaf, whv, wzc, itv, ebj, quw, oeg, jvi, nhv, vpb, hpg, xal, vkg,