The new anti-microbial material was obtained by the reaction of silver
acetate with sodium sulfite and sodium thiosulfate. From the followin
g facts, it was suggested that the product was composed of thiosulfato
silver complex; the facts were drastic change of solubility during th
e procedure, observation of no responce of the solution with chloride
ions, no sensitivity to the silver-selective-electrode of the solution
containing the product, and also estimation of the numbers of dissoci
ated ions in the solution of the complex through the process of electr
ic conductivity measurements of the solution.