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|Section2= |Section3= |Section7= }} :''For the sterilizing agent, see sodium metabisulfite. For the reducing agent, see sodium dithionite.'' Sodium dithionate Na2S2O6 is an important compound for inorganic chemistry. It is also known under names disodium dithionate, sodium hyposulfate, and sodium metabisulfate. The sulfur can be considered to be in its +5 oxidation state. It should not be confused with sodium dithionite, Na2S2O4, which is a very different compound, and is a powerful reducing agent with many uses in chemistry and biochemistry. Confusion between dithionate and dithionite is commonly encountered, even in manufacturers' catalogues. ==Preparation== Sodium dithionate is produced by the oxidation of sodium bisulfite by manganese dioxide: :2 NaHSO3 + MnO2 → Na2S2O6 + MnO + H2O Alternatively, it can be prepared by the oxidation of sodium sulfite by the silver(I) cation:〔 : + 2 Ag + SO → + 2 Ag Another method is via oxidation of sodium thiosulfate with chlorine: :3 Cl2 + Na2S2O3·5H2O + 6 NaOH → Na2S2O6 + 6 NaCl + 8 H2O And another method to produce sodium dithionate is treating sodium thiosulfate with sodium hypochlorite solution. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sodium dithionate」の詳細全文を読む スポンサード リンク
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