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|Section2= |Section3= |Section4= |Section7= |Section8= }} Sodium chromate is the inorganic compound with the formula Na2CrO4. It exists as a yellow hygroscopic solid, which can form tetra-, hexa-, and decahydrates. It is an intermediate in the extraction of chromium from its ores. Sodium chromate, like other hexavalent chromium compounds, is toxic and carcinogenic.〔 ==Production and reactivity== It is obtained on a vast scale by roasting chromium ores in air in the presence of sodium carbonate: :Cr2O3 + 2 Na2CO3 + 3/2 O2 → 2 Na2CrO4 + 2 CO2 This process converts the chromium into a water-extractable form, leaving behind iron oxides. Subsequent to its formation, the chromate salt is converted to sodium dichromate, the precursor to most chromium compounds and materials.〔 The industrial route to chromium(III) oxide involves reduction of sodium chromate with sulfur. 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 chromate」の詳細全文を読む スポンサード リンク
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