ジヒドリドテルル

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

  H220：極めて可燃性/引火性の高いガス

  H280：加圧ガス；熱すると爆発のおそれ

  H330：吸入すると生命に危険

• 注意書き

  P210：熱/火花/裸火/高温のもののような着火源から遠ざ けること。－禁煙。

  P260：粉じん/煙/ガス/ミスト/蒸気/スプレーを吸入しないこ と。

  P271：屋外または換気の良い場所でのみ使用すること。

  P284：呼吸用保護具を着用すること。

  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。

  P310：ただちに医師に連絡すること。

  P320：特別な治療が緊急に必要である（このラベ ルの．．．を見よ）。

  P377：漏洩ガス火災の場合：漏えいが安全に停止されな い限り消火しないこと。

  P381：安全に対処できるならば着火源を除去すること。

  P403：換気の良い場所で保管すること。

  P403+P233：換気の良い場所で保管すること。容器を密閉 しておくこと。

  P405：施錠して保管すること。

  P410+P403：日光から遮断し、換気の良い場所で保管するこ と。

  P501：内容物/容器を．．．に廃棄すること。

ジヒドリドテルル 化学特性,用途語,生産方法

• 説明

  Hydrogen telluride has the formula, H2Te. The simplest hydride of Te, it is rarely encountered because of its tendency to decompose to the constituent elements. Most compounds with Te–H bonds are unstable with respect to loss of H2. H2Te is chemically and structurally similar to H2S, and both are acidic species with H–X–H angles approaching 90°.The tellurides of the alkaline earth metals tend to immediately decompose on exposure to air, with liberation of tellurium. H2Te is prepared by the acidification of salts of Te^2-,such as Al2Te3 and Na2Te.
  Na2Te can be generated by the reaction of Na and Te in anhydrous ammonia. The intermediate in the acidification, the HTe is a stable anion.
  H2Te is an endothermic compound, and is unstable in air, rapidly decomposing into water and elemental tellurium:
  2H2Te+ O2 → 2H2O+ 2Te
  It is almost as acidic as phosphoric acid (pK_a=8.1×10^-3), having a pK_a value of about 2.3×10^-3. It reacts with many metals to form tellurides. However, many of these are unstable relative to their decomposition to the elements. Its CAS number is 7783-09-7 and its molecular weight is 129.6158 g/mol. It is a colorless gas and is toxic if breathed. Its density is 3.310 g/cm3 and its melting point is –49°C with a boiling point of –2.2°C. Its solubility in water is 0.701 g/100 ml of water at 20°C.

• 化学的特性

  Colorless gas.Soluble in water but unstable; soluble in alcohol and alkalies.

• 物理的性質

  Colorless gas; strong garlic-like odor; stable to light when dry but under-goes photochemical decompostion in the presence of moisture and dust; den-sity 5.68 g/L; liquefies to a colorless unstable liquid at -2°C, decomposed bylight; liquid density 2.57 g/mL at -20°C; solidifies at -49°C; soluble in water,alcohol and alkalies; pKa 2.6 (for first dissociation constant at 18°C) and 11.0(the dissociation constant at 25°C) for the second replaceable hydrogen.

• 使用

  It is synthesized by the action of acid on aluminum telluride. It has no industrial uses.

• 製造方法

  Hydrogen telluride is prepared by the reaction of aluminum telluride,Al₂Te₃ with hydrochloric acid:
  Al2Te₃ + 6HCl → 3H₂Te + 2AlCl₃
  It also may be prepared by electrolysis of a 50% sulfuric acid solution using atellurium cathode.

• 危険性

  See hydrogen selenide.

ジヒドリドテルル 生産企業

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7783-09-7, ジヒドリドテルル キーワード