コバルト(II)ジシアニド 化学特性,用途語,生産方法
物理的性質
The anhydrous form is a deep-blue powder; hygroscopic; density 1.872 g/cm
3; melts at 280°C; insoluble in water. The dihydrate is pink to reddish brown powder or needles; insoluble in water and acids; soluble in sodium or potassium cyanide solutions, ammonium hydroxide, and hydrochloric acid.
使用
The compound has limited commercial applications. It is used as a catalyst and in the preparation of cyanide complexes.
製造方法
The trihydrate salt is obtained as a reddish brown precipitate by adding potasium cyanide to a cobalt salt solution:
CoCl
2 + KCN + 3H
2O → Co(CN)
2?3H
2O + 2KCl
This on dehydration yields anhydrous Co(CN)
2. The Co(CN)
2?3H
2O precipitate formed above redissolves when excess KCN is added, forming a red solution of potassium cobalt(II) cyanide, K
4Co(CN)
6. Stoichiomtric amount of KCN should, therefore, be used in the preparation of cobalt(II) cyanide.
危険性
The compound is highly toxic by ingestion and possibly through other routes of exposure.
コバルト(II)ジシアニド 上流と下流の製品情報
原材料
準備製品