フッ化鉛 化学特性,用途語,生産方法
外観
白色～灰白色, 粉末
溶解性
冷水に難溶 (0.064g/100ml水 20℃)。硝酸に溶け、水にほとんど溶けない。
解説
PbF2(245.20)．フッ化鉛, Pb(OH)2またはPbCO3をフッ化水素酸に溶かし，蒸発させるか，水溶液中で酢酸鉛とKFまたはHFとを反応させるか，Pbと F2 との直接反応などで得られる．構造は2形がある．α形は室温で安定な無色の斜方晶系結晶．Pb原子のまわりのF原子は三面冠三角柱型九配位．密度約8.44 g cm－3．Pb-F約2.41～3.03 Å．F原子を互いに共有してつながっている．水に微溶．HNO3 酸性水溶液では溶解度が増す．有毒．β形は蛍光構造の高温型．Pb原子のまわりに8個のF原子が配位している．密度約7.77 g cm－3．Pb-F約2.55～2.57 Å．転移温度316 ℃．結晶はレーザー用，電子および光学器械用などに用いる．森北出版「化学辞典（第2版）
用途
電子工業材料、光学材料、セラミック材料。
化学的特性
Lead fluoride is a white to colorless, odorless
crystalline (rhombic, orthorhombic) solid
使用
Lead(II) fluoride is used in fuses, glass coatings to reflect infrared rays and phosphors for television screens and in low melting glasses. Further, it serves as a catalyst for the preparation of picoline.
主な応用
It is used as the transmission window in λ: 250 nm–10 mm and as the prism in the infrared region.
一般的な説明
Odorless white solid. Sinks in water.
反応プロフィール
Calcium carbide mixed with Lead fluoride , at ordinary temperatures, becomes incandescent [Mellor 5:862-64. 1946-47].
健康ハザード
Not irritating to skin or mucuous membranes; protect against chronic poisoning. Early symptoms of lead intoxication via inhalation or ingestion are most commonly gastrointestinal disorders, colic, constipation, etc.; weakness, which may go on to paralysis chiefly of the extensor muscles of the wrists and less often the ankles, is noticeable in the most serious cases. Ingestion of a large amount causes local irritation of the alimentary tract; pain, leg cramps, muscle weakness, paresthesias, depression, coma, and death may follow in 1 or 2 days. Contact with eyes causes irritation.
火災危険
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Some are oxidizers and may ignite combustibles (wood, paper, oil, clothing, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated.
職業ばく露
Used to make other chemicals, underwater paints; electronic and optical parts (for growing
single-crystal, solid-state lasers); in high-temperature dryfilm lubricants; and making special grades of glass.
輸送方法
UN3288 Toxic solids, inorganic, n.o.s., Hazard
Class: 6.1; Labels: 6.1-Poisonous materials, Technical
Name Required. UN2291 Lead compounds, soluble n.o.s.,
Hazard Class: 6.1; Labels: 6.1-Poisonous materials,
Technical Name Required
不和合性
Violent reaction with oxidizers, chemically active metals; calcium carbide. May ignite combustibles, such as wood, paper, oil, etc
フッ化鉛 上流と下流の製品情報
原材料
準備製品