A high-performance liquid chromatographic (HPLC) assay has been develo
ped for thimerosal and some of its degradation products: thiosalicylic
and 2,2'-dithiosalicylic acids. Using this method, the influence of f
ormulation factors as: isotonic agent, initial concentration, addition
of tromethamine, pH and container material, over thimerosal stability
was studied.