[{"from": "human", "value": "Provide a brief overview of this molecule. [I][I]"}, {"from": "gpt", "value": "Violet-black crystals with a metallic luster and a sharp odor. Mp: 133.5 \u00b0C, bp: 185 \u00b0C. Emits toxic vapor at room conditions; vapor becomes visibly purple when its concentration builds up in a confined space. Nearly insoluble in water but very soluble in aqueous solutions of iodides."}]