The viscosities of d/-a-Alanine at three different pH's have been measured at 35° and 45° C and the ß-coefficients have been calculated using the equation ŋ/ŋ0 = 1 + Be. The corresponding activation energies for viscous flow have been calculated with the help of the Nightingale- Benck equation. The effect of ionic charge on the ß-coefficient of -Alanine in its three different ionic forms has been discussed on the basis of ion-solvent interaction. © 1980, Akademische Verlagsgesellschaft, Wiesbaden