Density and viscosity measurements are reported for aqueous solutions of the potassium salt of penicillin-G at different temperatures (293.15 K to 308.15 K) and at ambient pressure. The density data are used to obtain apparent molar volumes of the potassium salt of penicillin-G (PGK). Also, the coefficient of thermal expansion and apparent molar expansivity data has been obtained using the density data at different temperatures. The relative viscosities (er) and the viscosity A, B, and D coefficients in the Jones-Dole equation er ) 1 + Ac1/2 + Bc + Dc2, with c ) concentration of the potassium salt of penicillin-G in aqueous solutions (0.005 moladm-3 to 0.12 moladm-3), have been determined. The values of the B and D coefficients were found to be high compared to simple 1:1 electrolytes. The values of the A coefficient do not show any trend as a function of temperature; however, the B coefficient decreases with an increase in temperature. The results are explained in terms of hydrophobic hydration of the anion and hydrophobic interactions between penicillin-G molecules in the premicellar region.
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.