수소텔루라이드

그림문자(GHS)

• 그림문자(GHS)

  

• 신호 어

  Danger

• 유해·위험 문구

  H220：극인화성 가스

  H280：고압가스; 가열시 폭발할 수 있음

  H330：흡입하면 치명적임

• 예방조치문구

  P210：열·스파크·화염·고열로부터 멀리하시오 - 금연 하시오.

  P260：분진·흄·가스·미스트·증기·...·스프레이를 흡입하지 마시오.

  P271：옥외 또는 환기가 잘 되는 곳에서만 취급하시오.

  P284：호흡 보호구를 착용하시오.

  P304+P340：흡입하면 신선한 공기가 있는 곳으로 옮기고 호흡하기 쉬운 자세로 안정을 취하시오.

  P310：즉시 의료기관(의사)의 진찰을 받으시오. 삼켰다면 즉시 의료기관(의사)의 도움을 받으시오.

  P320：긴급히 (…) 처치를 하시오.

  P377：누출성 가스 화재 시 : 누출을 안전하게 막을 수 없다면, 불을 끄려하지 마시오.

  P381：누출의 경우, 모든 점화원을 제거하시오.

  P403：환기가 잘 되는 곳에 보관하시오.

  P403+P233：용기는 환기가 잘 되는 곳에 단단히 밀폐하여 저장하시오.

  P405：밀봉하여 저장하시오.

  P410+P403：직사광선을 피하고 환기가 잘 되는 곳에 보관하시오.

  P501：...에 내용물 / 용기를 폐기 하시오.

수소텔루라이드 화학적 특성, 용도, 생산

• 개요

  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.

• 화학적 성질

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

• 물리적 성질

  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.

• 용도

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

• 제조 방법

  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.

• 위험도

  See hydrogen selenide.

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