Ammonium hexachloroplumbate is an inorganic chemical compound with the chemical formula . Synthesis. Adding ammonium chloride to a solution of lead(IV) tetraacetate in concentrated hydrochloric acid. Physical properties. Ammonium hexachloroplumbate forms yellow crystals of cubic system. The compound is slightly soluble in cold water and decomposes in hot water. Chemical properties. When added to cold concentrated sulphuric acid, the compound decomposes, yielding : The compound chlorinates tetraorganolead and hexaorganodilead compounds.