The phase relation of the system toluene-AlBr3−HBr was investigated at 23°. The three components form a homogeneous liquid phase in the following concentration range (in mole fractions): Toluene: 0.33–0.70 mole/mole, AlBr3: 0.15 to 0.50 mole/mole, HBr: 0.05–0.34 mol
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