[{"from": "human", "value": "Please give me some details about this molecule. [C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][Br]"}, {"from": "gpt", "value": "The molecule is used for organic synthesis, especially in the production of the synthetic intermediate phenyl magnesium bromide (a Grignard reagent). Bromobenzene is also used as an additive to motor oils and as a crystallizing solvent. Release of bromobenzene to the environment may occur during its production and the production of phenyl magnesium bromide, as well as in its use as a solvent and as an additive in motor oil (HSDB, 2003). It has been detected at low frequencies and at low concentrations in samples of food, ambient air, and finished water."}]