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|Section2= |Section3= }} Azo violet is an organic compound with the chemical formula C12H9N3O4. It is used as a dye and a pH indicator. It forms blue colour with magnesium in slightly alkaline medium. This reaction depends on adsorption of the dye on magnesium hydroxide. Ammonium ions reduce sensitivity of reaction. Any salt or salt solution containing magnesium will give this Violet colouring of solution. However, ammonium compounds such as ammonium chloride or ammonium hydroxide will give a different colour based on amount used. Still, it is used as identification test for magnesium. 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「Azo violet」の詳細全文を読む スポンサード リンク
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