Description General description Dithizone (Diphenylthiocarbazone) is used as chelating agent for zinc. It is widely used for the liquid-liquid and solid phase extraction of various metals, since it forms stable complexes with the metals. Other Notes Reagent for the extraction and separation of heavy metals; Reagent for the extraction and flame atomic absorption spectroscopic determination of metals, Reagent for the spectrophotometric detection of heavy metals