showed that there is a close correlation between the density at 20 °C and the molar proportion of the dicamba anion (xdic) in a given system; across the xdic range, a 0.1 increase in this parameter resulted in an increase in DSIL density of approximately 0.0038 g cm -3 . This relationship can be approximated to a linear function with very high accuracy (R² = 0.997), with exact regression parameters provided in Table .9 in Supplementary Data. The obtained results are consistent with previous studies on multi-ion ILs, where such systems have often been reported as having good correlation with a linear mixing law. Since the average molar mass of ILs and DSILs (Mw) increases proportionally with increasing xdic, it should be emphasized that a close linear relationship also exists between the average molar mass of systems A, AB0.1-AB0.9 and B and their measured density. This is confirmed by the fact that all analyzed systems are characterized by a very similar molar volume (Vm 20 ), defined as the quotient of the molar mass of a substance and its density at a given temperature.