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|Section2= |Section3= |Section7= |Section8= }} Sodium ferrocyanide is the sodium salt of the coordination compound of formula ()4−. It is a yellow crystalline solid that is soluble in water and insoluble in alcohol. Despite the presence of the cyanide ligands, sodium ferrocyanide has low toxicity (acceptable daily intake 0–0.025 mg/kg body weight〔). The ferrocyanides are less toxic than many salts of cyanide, because they tend not to release free cyanide. However, like all ferrocyanide salt solutions, addition of an acid can result in the production of cyanide gas, which is toxic. In its hydrous form, Na4Fe(CN)6·10H2O (sodium ferrocyanide decahydrate), it is sometimes known as yellow prussiate of soda. The yellow color is the color of ferrocyanide anion. ==Uses== Sodium ferrocyanide is a chemical additive known as E 535 in the EU. It is added to road and food grade salt as an anticaking agent. When combined with iron, it converts to a deep blue pigment called Prussian blue.〔(【引用サイトリンク】publisher = Encyclopædia Britannica )〕 In photography, it is used for bleaching, toning, and fixing. It is used as a stabilizer for the coating on welding rods. In the petroleum industry, it is used for removal of mercaptans. 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 ferrocyanide」の詳細全文を読む スポンサード リンク
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