Comparison of aqueous solubility estimation from AQUAFAC and the GSE.
The GSE (General Solubility Equation) and AQUAFAC (Aqueous Functional Group Activity Coefficients) are two empirical models for aqueous solubility prediction. This study compares the aqueous solubility estimation of a set of 1642 pharmaceutically and environmentally related compounds, using the two methods. The average absolute errors in the solubility prediction are 0.543 log units for AQUAFAC and 0.576 log units for the GSE. About 88.0% of the AQUAFAC solubilities and 83.0% of the GSE molar aqueous solubilities are predicted within one log unit of the observed values. The marginally greater accuracy of AQUAFAC is due to the fact that it utilizes fitted-parameters for many structural fragments and is based on experimental solubility data. The GSE on the other hand is a simpler, non-regression based equation which uses two parameters for solubility prediction.
University of Arizona, College of Pharmacy, 1703 E. Mabel Street, Tucson, AZ 85721, USA. jainp@pharmacy.arizona.edu
Parijat
P
Jain
Kia
K
Sepassi
Samuel H
SH
Yalkowsky
D000465:Algorithms; D002626:Chemistry, Pharmaceutical / Q000379:methods* / Q000592:standards; D003627:Data Interpretation, Statistical; D004785:Environmental Pollutants / Q000737:chemistry; D009930:Organic Chemicals / Q000737:chemistry; D004364:Pharmaceutical Preparations / Q000737:chemistry; D012015:Reference Standards; D015203:Reproducibility of Results; D012995:Solubility
D004785:Environmental Pollutants; D009930:Organic Chemicals; D004364:Pharmaceutical Preparations