[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][C][=C][C][=Branch1][=N][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N+1][=Branch1][C][=O][O-1][C][=C][C][=C][Branch1][N][C][=C][C][Ring2][Ring1][C][=C][Ring1][=Branch1][Ring1][S][N+1][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a synthetic, yellow crystalline solid that is insoluble in water and moderately soluble in toluene. It is not used for any commercial applications and is used only for research purposes. When heated to decomposition, 1,8-dinitropyrene emits toxic fumes of nitrogen oxides. 1,8-dinitropyrene is found in particulate emissions from combustion products, of which diesel exhaust is the principle source. The primary route of potential human exposure to this chemical is inhalation. Detectable levels of 1,8-dinitropyrene have been found in respirable particulates from ambient atmospheric samples. It is reasonably anticipated to be a human carcinogen. (NCI05)"}]