It is demonstrated for the first time that poly(4-(2,3-dihydrothieno [3,4-b] [1,4]dioxin-2-yl-methoxy)-1-butanesulfonic acid that can be considered as a self-doped alkoxysulfonated derivative of PEDOT (PEDOTS) can be used as an efficient dispersing agent of multi-walled carbon nanotubes (CNTs) in polar solvents. In spite of other poly-electrolytes that have been reported to effectively disperse CNTs, PEDOT-S is highly conducting and therefore, after casting on the electrode surface, the modified electrodes produce high currents due to the presence of two conducting components with over 3-times lower serial resistance as proved by electrochemical impedance spectroscopy. The modified electrode was successfully applied to electroreductive determination of mono- di- and tri-nitrobenzene(s) in acidic supporting electrolyte (0.1 M HClO4) by cyclic voltammetry, differential pulse or square-wave voltammetry with the detection limits reaching sub-micromolar levels. (C) 2016 Elsevier B.V. All rights reserved.