The electrochemical behaviour of triazolam has been determined using polarographic and cycHc voltammetric techniques. It appears that this compound is reduced following a classical process. A study of the hydrolytic reaction which occurs in acidic média shows that the triazole ring and the 5-o-phenyl substituent have a marked influence on the kinetics. Rate constants, half-life times, the order of the reaction and the degree of completion have been determined. The benzophenone structure of the hydrolysis product has been confirmed by '""C NMR. Quantitative analysis has been conducted, showing that triazolam can be determined up to 1x10"^ M using dp polarography.