Previous polarographic and voltammetric studies have led to conflicting statements regarding the reversibility or irreversibility of the 2-electron reduction of pyrazine in the range 3 > pH > 7, with no numerical estimates available describing the rates of electron exchange (k). This paper discusses the current-voltage behavior at the foot of the polarographic wave. Since the DME prevents continuous buildup of surface reductant (C*R), and since solution of the planar diffusion equations suggests that C*R/C*o> 1.0 (n=2) at the foot of the step, it is plausible that the forward reduction term in the Butler-Volmer Equation predominates. Our linear log plots were consistent with this and yieldedk= 3.1 × 10−3cm sec−1andα≃ 1.7, indicating the second step is rate limiting.