The crystals of alkanolamine 4-nitrobenzoates represented organic salts and revealed the variety of H-bonded supramolecular networks [1]. New single crystals of organic salt (EEA4NBA) of ethylethanolamine with 4-nitrobenzoic acid were obtained by dissolution of components in acetone and slow evaporation at room temperature. Single crystal XRD revealed that the crystal belongs to the monoclinic system with the centrosymmetric space group P21/c: a=6.8952(4), b=8.3181(7), c= 21.9904(17) Å, β=98.037(6)°. The protonated ethylethanolamine cations interconnected by N–H…O hydrogen bonds in the chain decorated by deprotanated 4-nitrobenzoate anions due to O–H…O and charge assisted N–H…O H-bonds, which form R22(9) graph set (Fig.1a).Figure 1. (a) The fragment of 1D supramolecular chain in EEA4NBA. (b) The variation of ionic conductivity with concentration of EEA4NBA in solution for given temperatures. The electric conductivities of aqueous solutions of EEA4NBA were measured in the temperature range 20C to 40C at atmospheric pressure and in the concentration range 5.10-3 - 1.10-4 mol.L-1, using the conductometric method (Fig. 1b). The limiting molar conductances, Λo and the association constants, KA were calculated from conductometric data. On the basis of electrical conductivity measurements, it was found that, as the temperature increases, the capability of EEA4NBA to dissociate decreases, and that reduces the value of Kd. The process is exothermic. Acknowledgement Authors thanks the Romanian National Authority for Scientific Research and Innovation, CCCDI-UEFISCDI, project PN3-P3-217/24BM/19.09.2016 and the bilateral Moldova-Romanian project 16.80013.5007.04/Ro.