The influence of addition of sodium polyacrylate (with 3 different molecular weights PA20=2500g/mol, PA30=8000g/mol and PA40=15,000g/mol) on the stability of TiO 2 dispersions was investigated using particle size (determined by static light scattering), zeta potential and rheological measurements. Diluted dispersions as well as those containing 20% TiO 2 were dispersed by sonication for 5min. The results show that without sonication and in the absence of NaPAA large aggregates with mean volume diameter of 3.89μm are produced. On sonication for 5min, the aggregates are broken down giving a mean volume diameter of 0.239μm. Addition of NaPAA at low concentration (0.2 and 0.4%) resulted in a large increase in mean volume diameter indicating aggregation of the initially formed small aggregates on sonication. When the concentration of NaPAA was ≥1%, the aggregates became dispersed giving mean volume diameter of about 0.2μm. These particle size measurements were confirmed by using SEM and TEM measurements. The zeta potential of diluted TiO 2 dispersion in the absence of NaPAA gave an isoelectric point of pH∼6. The effect of addition of sodium polyacrylate PA20, PA30 and PA40 on the zeta potential of TiO 2 dispersions at pH=3 showed neutralization of the positive charge on TiO 2 particles reaching a zero charge at PAA concentration of 0.3–0.4% above which the particles acquired a negative charge that increase with further increase of PAA concentration reaching a plateau value of −45mV when the PAA concentration was ≥1%. Steady state measurement showed that addition of PA20 to the TiO 2 dispersion causes a dramatic reduction in yield value when PA concentration is ≥1%. Oscillatory measurements were obtained for 30% TiO 2 suspension without any sonication. The frequency was kept constant at 1Hz, and the stress was gradually increased till a critical value was reached above which the modulus showed a rapid decrease with further increase of the stress. In this way both elastic modulus G′ and critical stress were measured as a function of PAA concentration. The results showed an initial increase in the elastic modulus reaching a maximum at critical PAA concentration above which there was a rapid reduction in both rheological parameters. These results indicated flocculation of TiO 2 dispersion at low PAA concentration which was accounted for/by charge neutralization and/or bridging. When the PAA concentration was ≥1% all dispersions showed low G′ and critical stress indicating a highly deflocculated system. An attempt was made to correlate the rheological results with zeta potential measurements.