It is found that the oxidation electrode process is trongly influenced by adsorption phenomena leading to an additional wave of high concentrations. The characteristics of the adsorption can be followed closely by electrocapillary curves, a-c desorption waves and d-c current-time curves. An irreversible reduction wave is observed at E//1/////2 equals minus 1. 43V for OEt-SacSacH. Comparative studies with the related compound O-ethylthioacetate are reported briefly.