The stability constants of various species formed by As(III)-Glycine in aqueous- nonaqueous mixtures of 1-propanol and Ethanol at 304K. DeFord and Hume's method is used to calculate the stepwise formation constants, the reduction is found to be quasireversible and diffusion controlled involving three electrons in each case. The constant ionic strength (µ=1M) has been maintained using KNO₃ as a supporting electrolyte. Gelling's method was used to calculate E^r_1/2 values for As(III) complexes. The complexes with metal to ligand ratio as 1;1, 1:2, 1:3 have been reported. The stability constants have been also calculated by Mihailov's method for As(III)-Glycine system at 304K for different percentages of 1-Propanol and Ethanol (20%, 40% and 60%).