Magnetic susceptibility measurements are an indispensable facet of modern solid state characterization. Although AC magnetic measurements have proven invaluable in the development of high temperature superconductors, these techniques have not yet been fully exploited in the characterization of organic superconducting materials. For example, measurements of the real chi’(T) and imaginary chi "(T) susceptibility components at constant AC field, and measurement of chi " as a function of the AC field at constant T can all be used for lower critical field determinations. chi "(H-ac, T) can also be used to estimate the magnetization critical current density J(cm). Furthermore, the superconducting transition in organic materials appears to be strongly frequency dependent, indicative of time dependent effects. The AC measurement has also proven extremely useful in the detection of multiple phases within these pivotal materials. This presentation briefly describes the AC measurement technique, and demonstrates its utility in the characterization of organic superconducting materials.