カドミウムジフルオリド 化学特性,用途語,生産方法
解説
CdF2(150.41)．金属カドミウムまたはカドミウムの酸化物，硫化物，塩化物などにフッ素を反応させると得られる．白色の粉末．等軸晶系．密度6.33 g cm－3．融点1100 ℃，沸点1748 ℃．水，フッ化水素酸，鉱酸に可溶，エタノールに不溶．ガラスの製造，半導体素子・光学装置・レーザー結晶の原料などに用いられる．[CAS 7790-79-6]
森北出版「化学辞典（第2版）
用途
研究用途、発行スクリーン用途の蛍光剤
化学的特性
White powder
物理的性質
Colorless cubic crystal; density 6.33 g/cm
3; melts at 1,110°C; vaporizes at 1,748°C; vapor pressure 5 torr at 1,231°C; moderately soluble in water, 4.35 g/100mL at 25°C; soluble in hydrofluoric and other mineral acids; practically insoluble in alcohol and liquid ammonia.
使用
Cadmium fluoride is used in phosphors, glass and nuclear reactor controls. It is also used in high-temperature lubricants and to start crystals for lasers. It is used in oxygen-sensitive applications such as the production of metallic alloys and it is also used in limited medical treatment protocols. In addition, it can be used in synthetic organic chemistry.
定義
Available as pure crystals, 99.89%, d 6.6, mp approx-
imately 1110C, soluble in water and acids, insoluble
in alkalies.
製造方法
Cadmium fluoride is prepared by the reaction of gaseous fluorine or hydrogen fluoride with cadmium metal or its salt, such as chloride, oxide or sulfide:
Cd + F
2 → CdF
2Cd + 2HF → CdF
2 + H
2CdO + 2HF → CdF
2 + H
2O
It also may be obtained by dissolving cadmium carbonate in 40% hydrofluoric acid solution, evaporating the solution and drying in vacuum at 150°C:
CdCO
3 + 2HF → CdF
2 + H
2O + CO
2It also may be prepared by mixing cadmium chloride and ammonium fluoride solutions, followed by crystallization.
安全性プロファイル
Confirmed human
carcinogen. Poison by subcutaneous route.
Violent reaction with K. When heated to
decomposition it emits very toxic fumes of
Cd and F-. See also FLUORIDES and
CADMIUM COMPOUNDS.
純化方法
Crystallise it by dissolving it in hot water (25mL/g at room temperature) at 60o, filtering, then cooling. [Kwasnik in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 243 1963.]
カドミウムジフルオリド 上流と下流の製品情報
原材料
準備製品