[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][=Branch1][#Branch1][=C][/As][Branch1][C][Cl][Cl][\\Cl]"}, {"from": "gpt", "value": "When pure, a colorless oily liquid solidifying at -13 \u00b0C. Impurities cause colors ranging from brown to violet. Faint odor of geranium. Irritating to the eyes and mucous membranes at concentrations below the threshold of odor. Very toxic; used as a war gas. Produces severe vesication (blistering) even through rubber (Merck); absorbed through the skin to produce seven systemic effects. Antidote: dimercaprol (British Anti-Lewisite). Prolonged exposure of container to fire or intense heat may result in violent rupturing and rocketing of container."}]