[{"from": "human", "value": "Could you give me a brief overview of this molecule? [I][Pb][I]"}, {"from": "gpt", "value": "The molecule appears as a yellow crystalline solid. Insoluble in water and denser than water. Primary hazard is threat to the environment. Immediate steps should be taken to limit spread to the environment. Used in printing and photography, to seed clouds and other uses."}]