NIOBIUM(V) IODIDE

그림문자(GHS)

• 그림문자(GHS)

  

• 신호 어

  Danger

• 유해·위험 문구

  H225：고인화성 액체 및 증기

• 예방조치문구

  P210：열·스파크·화염·고열로부터 멀리하시오 - 금연 하시오.

  P233：용기를 단단히 밀폐하시오. 용기는 환기가 잘 되는 곳에 단단히 밀폐하여 보관하시오.

  P240：용기와 수용설비를 접지 및 접합시키시오.

  P241：폭발 방지용 장비[전기적/환기/조명/...]을(를) 사용하시오.

  P242：스파크가 발생하지 않는 도구를 사용하시오

  P243：정전기 방지 조치를 취하시오.

  P280：보호장갑/보호의/보안경/안면보호구를 착용하시오.

  P303+P361+P353：피부(또는 머리카락)에 묻으면 오염된 모든 의복은 벗거나 제거하시오 피부를 물로 씻으시오/샤워하시오.

  P370+P378：화재 시 불을 끄기 위해 (Section 5. 폭발, 화재시 대처방법의 적절한 소화제)을(를) 사용하시오.

  P403+P235：환기가 잘 되는 곳에 보관하고 저온으로 유지하시오.

  P501：...에 내용물 / 용기를 폐기 하시오.

NIOBIUM(V) IODIDE 화학적 특성, 용도, 생산

• 화학적 성질

  black powder(s); monoclinic, a=1.058 nm, b=0.658nm, c=1.388nm; sensitive to moisture; obtained by reaction of excess I2 with Nb metal in a sealed tube [STR93] [KIR81]

• 제조 방법

  A vertical tube of Vycor or Pyrex glass (I.D. approximately 23 mm., wall thickness 2.5 mm.) is charged with 4-12 g. of Nb metal (either solid or powder). A dense glass wool plug is placed over the charge and approximately 20 cm. from the closed tube end, followed by a 20% excess of pure, resublimed I₂ powder. The tube and its contents are thoroughly degassed in a high vacuum and melt-sealed under vacuum. Then the reactor is placed in a slightly inclined position (with the Nb metal at the higher and the I₃ at the lower end) and heated by means of two separate tubular electric furnaces (these meet at the center of the tube). The niobium is heated to 300℃ and the I₂ first to 180℃ and then to 250℃. The reaction is nearly quantitative after 10-15 hours and Nbl₅ crystals collect in the transition zone between the two temperature regions. The yields are lower with Nb powder than with solid Nb. The reactor is broken at the center, the Nbl₅ is removed under anhydrous conditions, and repeatedly rinsed with dry petroleum ether (under N₂) until the adhering I₂ is removed and the petroleum ether stays colorless. The traces of petroleum ether are evaporated in vacuum.

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