There are numerous physical property estimation techniques which accurately predict a chemical's or mixture's physical properties. These techniques can be classified into two broad categories: group contribution techniques and equation oriented techniques. Group contribution estimation techniques begin with a compound's molecular structure. A "contribution" for each group found in the structure is totaled into an estimate. Once several basic properties are estimated by group contribution techniques these can be entered into equation oriented techniques for further property estimation.
This webpage provides descriptions and calculation capabilities for a number of commonly used physical properties. For additional physical property estimation capabilities please download our Cranium Demo. Cranium goes far beyond this online estimation demonstration enabling you to draw molecular structures, enter your own estimation techniques, estimate mixture properties and create your own databases.
We are always happy to discuss physical properties. Please your comments and suggestions.