[{"from": "human", "value": "What can you tell me about this molecule? [O][=Se][Branch1][C][Cl][Cl]"}, {"from": "gpt", "value": "The molecule appears as a colorless to light-colored liquid. Insoluble in water and denser than water. Contact may severely irritate skin, eyes and mucous membranes. May be toxic by ingestion, inhalation and skin absorption. Used to make other chemicals."}]