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| 融点 | 678°C | | 比重(密度) | 4.909 g/mL at 25 °C(lit.) | | 溶解性 | acetone: soluble(lit.) | | 外見 | beads | | 色 | Green | | 比重 | 4.909 | | 水溶解度 | Soluble in water. Soluble in methyl acetate, ether, alcohol, acetone. | | Sensitive | Hygroscopic | | Merck | 14,2435 | | 暴露限界値 | ACGIH: TWA 0.02 mg/m3 | | CAS データベース | 7789-43-7(CAS DataBase Reference) | | EPAの化学物質情報 | Cobalt bromide (7789-43-7) |
| | コバルト(II)ジブロミド Usage And Synthesis |
| 外観 | 緑色, 粉末又は塊 | | 溶解性 | 水に溶ける。 | | 解説 | 臭化コバルト(Ⅱ),加熱したコバルトに臭素および臭化水素の混合気体を通じると無水物が得られる．緑色の結晶．密度4.91 g cm－3．融点678 ℃(窒素中)．強潮解性で，水に易溶．酸化コバルト(Ⅱ)あるいは炭酸コバルト(Ⅱ)を臭化水素酸に溶かして濃縮すると六水和物が得られる．
森北出版「化学辞典（第2版）
| | 用途 | 触媒原料。 | | 化学的特性 | The green anhydrous salt is prepared by dehydration of the red hexahydrate or by the action of bromine on heated cobalt. It is very soluble in water and soluble in many polar organic solvents; it deliquesces in moist air to a red solution. The hexahydrate crystallizes from aqueous solution at room temperature; it melts at 100°, evolving water and forming the purple dihydrate. | | 化学的特性 | Reddish violet crystalline powder | | 使用 | Cobalt(II) bromide is used as a catalyst in organic synthesis. It is used as a precursor in the production of ethylsulfanyl)porphyrazinato)cobalt(II), which gives the possibility of intermolecular ferromagnetic interactions. | | 使用 | Used in the preparation of a new complex, Co(OESPz), which offers the possibility of intermolecular ferromagnetic interactions.1 | | 一般的な説明 | COBALT(II) BROMIDE is a red violet crystalline solid. COBALT(II) BROMIDE is soluble in water. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. COBALT(II) BROMIDE is used as a catalyst in the production of other chemicals. | | 空気と水の反応 | Water soluble. | | 反応プロフィール | Acidic salts, such as COBALT(II) BROMIDE, are generally soluble in water. The resulting solutions contain moderate concentrations of hydrogen ions and have pH's of less than 7.0. They react as acids to neutralize bases. These neutralizations generate heat, but less or far less than is generated by neutralization of inorganic acids, inorganic oxoacids, and carboxylic acid. They usually do not react as either oxidizing agents or reducing agents but such behavior is not impossible. Many of these compounds catalyze organic reactions. When heated to decomposition can give off highly toxic fumes of Br [USCG, 1999]. | | 健康ハザード | SOLID: Irritating to skin and eyes. Harmful if swallowed. | | 火災危険 | Not flammable. POISONOUS FUMES ARE PRODUCED WHEN HEATED TO DECOMPOSITION. When heated to decomposition can give off highly toxic fumes of Br. | | 純化方法 | Crystallise it from water (1mL/g) by partial evaporation in a desiccator. The anhydrous salt is soluble in EtOH, Me2CO, MeOAc to form blue-coloured solutions. [Glemser in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol II p 1517 1965.] |
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