Mass density was measured by dispensing 50 μL of each mixture into an empty vial with a syringe (Hamilton Gastight 1705), then determining the mass of the dispensed liquid with the same balance used for mixture preparation. Each density was measured six times and then averaged. The systematic uncertainties are estimated to be 0.005 g/mL based on densities of pure compounds compared to literature values, and the random uncertainties are estimated to be 0.009 g/mL based on the standard deviation of measuring densities six times. Overall, we estimate that the uncertainty in the measured mixture density is ±1%.