The influence of the dicamba molar ratio of the DSILs analyzed on the changes in the chemical shifts, which is evident in the 1 H NMR spectra for all 3 ions present in the systems to some extent, is imperceptible in the 13 C NMR spectra. The analysis revealed that signals from the same carbon atoms occurred at nearly identical chemical shifts (max. ±0.2 ppm). Moreover, these changes were not correlated with xdic. For example, the signal originating from the carbon atom in the CH2 group in the MCPA anion occurred at almost identical chemical shifts of approximately 67.9-68.2 ppm, with the σ value increasing as follows: AB0.8 < A < AB0.4 ≈ AB0.6 < AB0.2. This phenomenon shows that the effect of the change in the molar fraction of the competing anion in the DSIL system on the chemical environment of the carbon atoms cannot be unequivocally determined. An FT-IR analysis of the obtained ILs and DSILs revealed the presence of all the characteristic bands derived from the cation and from both anions in the collected spectra. We also noted increases in the intensity of the bands derived from the dicamba anion with increasing xdic value. This effect is evident in the highlighted regions from a comparison of the FT-IR spectra from A, AB0. the ions of the analyzed systems and between the hydroxyl group and water that remained in the ILs and DSILs after drying.