Ignoring the turbid experimental region for the moment (we will return to this shortly), an inspection of Tables and reveals that for each CAPB / SLSar mole ratio the regions of higher ⟨N agg ⟩ broadly corresponds to the regions of high zero shear viscosity with an error of around 0.3 pH units. The small discrepancy in the pH is could be due to the approximations made when modelling the pH during the simulations, where the Henderson-Hasselbalch equation was used to determine the ratio of protonated to deprotonated surfactants corresponding to a particular pH. As discussed in Section 3.2 this does not reflect the complex effects of micelle environment on the pK a of an ionic surfactant. However, the error in the optimal pH is small and it would not be difficult for a formulator, having used the simulations to choose the pH at which to work, to adjust the pH to the true optimum. This would still represent a significant speedup over formulating without predictions.