コバルト(II)ジフルオリド 化学特性,用途語,生産方法
解説
フッ化コバルト(Ⅱ)：CoF2(96.93)．二フッ化コバルトともいう．水酸化コバルト(Ⅱ)，炭酸コバルト(Ⅱ)をフッ化水素酸に溶かして濃縮すると水和物が生成する．これをフッ化水素気流中で脱水すると無水物が得られる．無水物はばら色の粉末または結晶．密度4.46 g cm－3．融点約1200 ℃，沸点約1400 ℃．
性質
空気中で加熱すると酸化コバルト(Ⅱ)になる．水に微溶．熱水で分解する．酸に難溶，エタノール，エーテルに不溶．水和物には二，三，四水和物がある．いずれも赤色の結晶で，水に易溶．毒性は強い．
化学的特性
Rose-red crystals or powder. Soluble in cold
water and hydrofluoric acid. Decomposes in hot
water. Ammine complexes can be prepared from
the hydrate.
物理的性質
Red tetragonal crystal; density 4.46 g/cm
3; melts at 1,127°C; vaporizes around 1,400°C; sparingly soluble in water; soluble in warm mineral acids; decomposes in boiling water. Tetrahydrate is red orthogonal crystal; density 2.22 g/cm
3; decomposes on heating; soluble in water; di- and trihydrates are soluble in water.
使用
Cobalt(II) fluoride can be used as a catalyst to alloy metals. It is also used for optical deposition, of which it tremendously improves optical quality. The compound may be used in dental care.
一般的な説明
Violet to red solid. Sinks and mixes slowly with water.
反応プロフィール
Cobalt(II) fluoride is a toxic, light brown crystalline material, when exposed to water Cobalt(II) fluoride forms highly corrosive hydrofluoric acid. When heated to decomposition Cobalt(II) fluoride emits toxic fumes of metallic cobalt and fluorides [Lewis, 3rd ed., 1993, p. 344].
危険性
Highly toxic.
健康ハザード
INHALATION: Inhalation of dust may cause pulmonary symptoms. EYES: Irritation. SKIN: Skin rashes, dermatitis. INGESTION: Nausea and vomiting caused by local irritation.
LD50 oral (rat): 150 mg/kg
安全性プロファイル
Poison by ingestion.
When heated to decomposition it emits
toxic fumes of Co and F-.
コバルト(II)ジフルオリド 上流と下流の製品情報
原材料
準備製品