Cobalt Oxide - Sanka Cobalt

[ I ] Cobalt oxide(II): CoO(74.93). Obtained by heating cobalt carbonate in the absence of air, or by heating metallic cobalt to red heat and then reacting with steam. Off-white powder or crystals. Density 6.45 g cm ^-3 . Melting point 1800 °C. Insoluble in water, aqueous ammonia, and ethanol, _soluble in acid. When heated in air, it becomes _Co3O4 . In moist air, it is easily oxidized to CoO(OH). Raw material for magnetic materials. Used as a secondary battery material, catalyst for various oxidation reactions, colorant for porcelain, and in glass manufacturing. [CAS 1307-96-6] [ II ] Cobalt oxide(III): _Co2O3 (165.86). Also known as _dicobalt trioxide. Obtained by oxidizing cobalt chloride(II) with potassium chlorate. Dark brown powder. Hygroscopic. Density 5.18 g cm ^-3 . Decomposes at 895 °C to produce Co ₃ O _4. Has an oxidizing effect, and when dissolved in hydrochloric acid, produces chlorine. Insoluble in water and ethanol. Used as a glass colorant. [CAS 1308-04-9][CAS 12016-80-7:Co ₂ O ₃ ･H ₂ O] [ Ⅲ ] Cobalt(Ⅱ) oxide dicobalt(Ⅲ): Co ₃ O ₄ (240.80). Also called tricobalt tetroxide. Obtained by igniting cobalt hydroxide in air. Black powder. Hygroscopic. Density 6.07 g cm ^-3 . Spinel structure of Co ^Ⅱ Co ^Ⅲ ₂ O _4. Becomes CoO at 900-950 °C. Insoluble in water, hydrochloric acid, nitric acid, and aqua regia, soluble in sulfuric acid and molten sodium hydroxide. Used in secondary battery materials, electronic materials, pigments, glazes, etc. [CAS 1308-06-1]

Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition

【Ⅰ】酸化コバルト(Ⅱ)：CoO(74.93)．炭酸コバルトを空気を断って熱するか，金属コバルトを赤熱して水蒸気を作用させると得られる．灰白色の粉末または結晶．密度6.45 g cm^－3．融点1800 ℃．水，アンモニア水，エタノールに不溶，酸に可溶．空気中で加熱するとCo₃O₄になる．湿った空気中では容易に酸化されてCoO(OH)になる．磁性材料の原料．二次電池材料，各種酸化反応の触媒，磁器の着色剤，ガラスの製造などに用いられる．[CAS 1307-96-6]【Ⅱ】酸化コバルト(Ⅲ)：Co₂O₃(165.86)．三酸化二コバルトともいう．塩化コバルト(Ⅱ)を塩素酸カリウムで酸化すると得られる．黒褐色の粉末．吸湿性がある．密度5.18 g cm^－3．895 ℃ で分解してCo₃O₄を生じる．酸化作用があり，塩酸に溶かすと塩素を発生する．水，エタノールに不溶．ガラス着色剤に用いられる．[CAS 1308-04-9][CAS 12016-80-7:Co₂O₃･H₂O]【Ⅲ】酸化コバルト(Ⅱ)二コバルト(Ⅲ)：Co₃O₄(240.80)．四酸化三コバルトともいう．水酸化コバルトを空気中で強熱すると得られる．黒色の粉末．吸湿性がある．密度6.07 g cm^－3．Co^Ⅱ Co^Ⅲ₂O₄のスピネル型構造．900～950 ℃ でCoOになる．水，塩酸，硝酸，王水に不溶，硫酸や融解水酸化ナトリウムに可溶．二次電池材料，電子材料，顔料，うわぐすりなどに用いられる．[CAS 1308-06-1]

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