This is a simple implementation of Girolami's method, a very simple technique to estimate the density of a liquid compound based on group contributions. Although a bit crude, it has shown very good results.
The following results follow from the comparison with a density dataset originally elaborated by US Environmental Protection Agency. As can be readily seen, the method is quite accurate, and fails apreciably only for a few outsider values.
| Mean error | 0.082 g·cm-3 |
| Std. dev. | 0.095 g·cm-3 |
| Maximum error | 1.479 g·cm-3 |
