TETRAFLUOROBORATE 1-BUTYL, 3-METHYLIMIDAZOLIUM AT DIFFERENT TEMPERATURES.Densities of DL-alanine in aqueous ionic liquid, 1-butyl, 3-methylimidazolium tetrafluoroborate solutions were measured from 283.15 to 313.15 K.The densities measured were used to calculate apparent molar volumes (V f ), apparent molar volume limits (V f 0 ), transfer molar volume limits (DV f 0 ) and hydration number (NH).The behavior of (DV f 0 ) was interpreted in terms of solute-solvent interactions on the basis of the cosphere overlap model.The hydration numbers were positive and explained by dehydration and electrostriction.