The ion transfer of Chromazural S (CAS) across the interface of W/NB and W/1,2-DCE was studied by cyclic voltammetry and chronopotentiometry with linear current scanning. The transfer mechanism of CAS was proposed in terms of its electrochem. behavior and equilibrium of dissociation The experimental data obtained for half-wave potential D0wf1/2 and pH in W phase are in agreement with the theor. equation based on the mechanism proposed. The standard potential differences D0wf0 and standard Gibbs energy of Chrom Azurol S across the interface were calculated

Key words: WATER, NITROBENZENE, CHROME AZUROLS, DICHLOROETHANE, DISSOCIATION EQUILIBRIUM, CHRONOPOTONTIOMETRY, GIBBS FREE ENERGY, CYCLOVOLTAMGRAPH, INTERFACE CHEMISTRY, CURRENT SCANNING