Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamics of the solubility of reserpine in {{2-(2-ethoxyethoxy)ethanol + water}} mixed solvent systems at different temperatures

Shakeel, F.[Faiyaz], Haq, N.[Nazrul], Siddiqui, N. A.[Nasir A.], Alanazi, F. K.[Fars K.], Alsarra, I. A.[Ibrahim A.]
J. Chem. Thermodyn. 2015, 85, 57-60
ABSTRACT
Thermodynamics of solubility of the bioactive compound reserpine in various {2-(2-ethoxyethoxy)ethanol + water} mixed solvent systems was investigated in this study. The solubility of reserpine was determined from T = (298.15 to 338.15) K at atmospheric pressure using the reported method of Higuchi and Connors. Values of the measured solubility of reserpine were correlated with the ideal and Yalkowsky models. The root mean square deviations (RMSD) were observed to be less than 0.020 by an ideal model. However, the RMSD values were observed as less than 0.050 by the Yalkowsky model. The mole fraction solubility of reserpine was observed highest in pure 2-(2-ethoxyethoxy)ethanol (7.69 10 4 at T = 298.15 K) and lowest in pure water (9.71 10 7 at T = 298.15 K) at each temperature investigated. The results of the Van t Hoff and Krug analysis (thermodynamic studies) indicated endothermic and spontaneous dissolution of reserpine in all {2-(2-ethoxyethoxy)ethanol + water} mixed solvent systems.
Compounds
# Formula Name
1 C33H40N2O9 Reserpine
2 C6H14O3 3,6-dioxa-1-octanol
3 H2O water
Datasets
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.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • 2
  • 3
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Solvent: Mass fraction - 2; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • UV-visible spectrophotometry
  • 55
  • POMD
  • 1
  • 3
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • UV-visible spectrophotometry
  • 5
  • POMD
  • 1
  • 2
  • Mole fraction - 1 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 1
  • UV-visible spectrophotometry
  • 5