Solubility prediction in octanol: A technical note

Area of Science:

• Physical Chemistry
• Computational Chemistry

Background:

• Accurate prediction of octanol-water partition coefficients is crucial for environmental fate and pharmacokinetic studies.
• Existing methods for solubility estimation can be complex and time-consuming.

Purpose of the Study:

• To develop a rapid and accurate method for estimating octanol solubilities of organic compounds.
• To establish a predictive equation based on readily available physical properties.

Main Methods:

• Derivation of a predictive equation using a dataset of organic compounds.
• Validation of the equation by comparing predicted solubilities with experimental values.

Main Results:

• A novel equation was derived for rapid estimation of octanol solubilities.
• Predictions showed an average absolute error of 0.39 logarithmic units over four orders of magnitude.
• The method demonstrated good accuracy, particularly for less strongly bonded compounds.

Conclusions:

• Melting point alone is a sufficient predictor for rapid octanol solubility estimation.
• The derived equation offers a valuable tool for preliminary assessments in chemical research and development.
• Further refinement may be needed for strongly bonded compounds.