Electrochemical degradation of thiocarbamate active ingredients was investigated in aqueous NaCl solutions. Degradation was studied with spectrophotometric methods that allowed specific light absorptions of thiocarbamates (212-220 nm), HClO (236-238 nm) and Cl-2 (225-233 nm) to be periodically or continuously measured. Measurements were also done through chromatographic analysis. The results indicate that under the reaction conditions applied, the electrochemical degradation of thiocarbamates in NaCl solutions takes place not only on the electrode but mainly in the solution phase through 'indirect' electrolysis involving the intermediates of NaCl electrolysis (Cl-2, HClO, ClO-). This degradation process can be controlled efficiently with the help of electrochemical reaction parameters.