We observe a steadily increasing viscosity peak as the mole ratio of CAPB / SLSar is increased up to 1.5. Further increasing to the ratio to 4.0 results in a dramatic drop in recorded viscosity. We observe the largest peaks in viscosity at close to the experimentally recorded value pK a for SLSar of 4.5 where the molar ratio of anionic to acid form of SLSar is approximately 1:1. Similar behavior was observed by Vu et al. who hypothesized that the the hydrogen bonding between the acid and anionic forms of SLSar and the zwitterionic component (CAPB here) at the effective pK a is a contributing interactions leading to viscosity enhancement.