砒化マグネシウム

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Danger

• 危険有害性情報

  H301：飲み込むと有毒

  H331：吸入すると有毒

  H400：水生生物に強い毒性

  H410：長期的影響により水生生物に非常に強い毒性

• 注意書き

  P261：粉じん/煙/ガス/ミスト/蒸気/スプレーの吸入を避ける こと。

  P304+P340：吸入した場合：空気の新鮮な場所に移し、呼吸しやすい 姿勢で休息させること。

  P405：施錠して保管すること。

砒化マグネシウム 化学特性,用途語,生産方法

• 説明

  Magnesium arsenide has the molecular formula of Mg3As2 and the molecular weight of 223.6592 g/mol. It may be prepared by direct reaction between the elements. Since As sublimes at 614°C and Mg melts at 650°C, the latter is melted at about 675°C in an inert atmosphere like argon (not N2 which would form nitrides) and arsenic vapors are carried into the reaction zone by a stream of Ar gas:
  3Mg + 2As + heat ? Mg3As2
  Mg3As2 is obtained by this method as a deep-brown, X-ray amorphous powder. Magnesium arsenide has the CAS number of 12044-49-4. This compound decomposes in contact with water:
  Mg3As2 + 3H2O ? 2AsH3 + 3Mg(OH)2
  Thus, it must be stored under dry conditions. Its density is 3.15 g/cm³. This compound is dimorphic with the low temperature form, β-Mg3As2 being cubic (α = 12.33?) and the high-temperature form, α-Mg3As2 being hexagonal. It crystallizes in the anti-La2O3 crystal structure, with unit-cell parameters of: a = 4.264A ° , c = 6.738?, c/a = 1.580. Both of these compounds are semiconductors. The latter has a band gap, E_g, of 2.2eV (564 nm).

• 使用

  The structure of magnesium arsenide is not ionic but covalent. Magnesium arsenide was used as a rodenticide and insecticide. Its toxicity to humans has led to its prohibition in the US and Europe.

砒化マグネシウム 生産企業

Global(18)Suppliers

12044-49-4, 砒化マグネシウム キーワード