The new amino acid anion QASs (1Asp-4Asp, 1Ala-4Ala) are characterized by higher water content (from 1.44% for 2Ala to 2.69% for 3Ala) compared to the values determined for bromides (0.2-1.0%). This is a typical phenomenon for QASs with the amino acid anion . More thorough drying would require a dry environment in a glovebox and the use of multi-stage azeotropic distillation. For 4Asp and 4Ala salts with a 2hydroxyethyl substituent, it was impossible to determine the exact water content due to the high hygroscopicity of these compounds; the water content values recorded during the analyses (9.6 ±0.24% for 4Asp and 8.2 ±0.15% for 4Ala) were characterized by two orders of magnitude greater measurement error than for the other compounds testedthe error value for other compounds ranged from 0.002 to 0.005%.