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<jats:title>Abstract</jats:title><jats:p>A need for valence‐pure <jats:sup>113</jats:sup>Sn<jats:sup>2+</jats:sup> and <jats:sup>113</jats:sup>Sn<jats:sup>4+</jats:sup> compounds required the development of the methods reported in this communication. Commercially available <jats:sup>113</jats:sup>Sn comes either as metallic Sn which is contaminated with isotopes of Sn as well as with antimony and indium or as a hydrochloric acid solution of <jats:sup>113</jats:sup>SnCl<jats:sub>4</jats:sub> plus some <jats:sup>113</jats:sup>SnCl<jats:sub>2</jats:sub>. The procedures reported here yield a chemically atable powder of <jats:sup>113</jats:sup>SnSO<jats:sub>4</jats:sub> which is greater than 98% in the Sn<jats:sup>2+</jats:sup> form.</jats:p><jats:p>There are two major advantages in preparing the <jats:sup>113</jats:sup>SnSO<jats:sub>4</jats:sub>. First, many other<jats:sup>113</jats:sup>SnSO<jats:sub>4+</jats:sub> compounds can be readily prepared by oxidizing an acidic solution of <jats:sup>113</jats:sup>SnSO<jats:sub>4</jats:sub> with hydrogen peroxide with no contamination of the resulting Sn<jats:sup>4+</jats:sup> solution with oxidising agent. In contrast, the reduction of Sn<jats:sup>4+</jats:sup> to <jats:sup>2+</jats:sup> salts is not easily accomplished. Second as polarographic evidence indicates, sulfate is a very weak complexer of Sn and thus many new salts of Sn can be prepared simply by mixing a selected new anion in to a solution containing <jats:sup>113</jats:sup>SnSO<jats:sub>4</jats:sub>.</jats:p>