In this research, we studied the influence of the pH (3,0, 4.0, 5.0, and 6.0), the temperature [(303.1, 308.1, 313.1, and 318.1) K], and the concentration of the pectin [(0.002, 0.004, 0.008, and 0,010) mass fraction] on the density and the kinematic viscosity of aqueous solutions containing low and high metoxilation pectin. The exponential model used to analyze the data of kinematic viscosity was well adjusted to the experimental data with R 2 equal to 0.99 in all of the cases. The data of the density presented a relation with the concentration and an inverse relation with the temperature in all the pH values studied. The lineal model used for correlation density gave a good fit to the experimental data. © 2009 American Chemical Society.