Densities and viscosities for binary mixtures of 4-methylbenzene-1,3-diamine and 2-methylbenzene-1,3-diamine in solvents of water, ethanol, propan-1-ol, and butan-l-ol were measured at T = (293.15, 303.15, 313.15, 323.15, and 333.15) K under atmospheric pressure. The measured densities and viscosities of the studied systems were correlated by the Guimaraes's equation and the extended Jones-Dole equation, respectively. Apparent molar volumes (V-phi) and the activation energies of viscous flow (E-a) were calculated by experimental results, and V-phi was correlated by a linear equation to obtain the limiting apparent molar volumes at infinite dilutions (V-phi(0)) and experimental slope (S-V). The V-phi,V- V(phi)(0)and S-V values have been qualitatively used to interpret the solute-solvent and solute-solute interactions via hydrogen bond and hydrophobic hydration interactions between component molecules, which origins from the structural factors.