コバルト(II)ジヨージド

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Warning

• 危険有害性情報

  H315：皮膚刺激

  H317：アレルギー性皮膚反応を起こすおそれ

  H319：強い眼刺激

  H335：呼吸器への刺激のおそれ

  H341：遺伝性疾患のおそれの疑い

• 注意書き

  P201：使用前に取扱説明書を入手すること。

  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。

  P280：保護手袋/保護衣/保護眼鏡/保護面を着用するこ と。

  P305+P351+P338：眼に入った場合：水で数分間注意深く洗うこと。次にコ ンタクトレンズを着用していて容易に外せる場合は外す こと。その後も洗浄を続けること。

  P308+P313：暴露または暴露の懸念がある場合：医師の診断/手当てを 受けること。

  P405：施錠して保管すること。

コバルト(II)ジヨージド 価格

コバルト(II)ジヨージド 化学特性,用途語,生産方法

• 解説

  CoI2(312.74)．無水物にはα，β形の2変態がある．ヨウ素中でコバルト粉末を加熱するとα形の無水物が得られる．α形は黒色の結晶．吸湿性が強い．密度5.58 g cm－3．融点515 ℃(真空中)，沸点570 ℃(真空中)．水に易溶．α形を真空中で加熱昇華するとβ形となる．β形は黄色の粉末．密度5.45 g cm－3．潮解性で，400 ℃ で分解する．水溶液は無色．水酸化コバルト(Ⅱ)をヨウ化水素酸に溶かすと各種の水和物が得られる．六水和物は赤褐色の柱状晶．密度2.90 g cm－3．吸湿性で，空気にさらすとヨウ素を失い，27 ℃ で水6分子を失う．水に可溶．湿度指示薬，有機反応の触媒などに用いられる．[CAS 15238-00-3:CoI2][CAS 15238-00-3:CoI2･6H2O]
  森北出版「化学辞典（第2版）

• 説明

  Cobalt iodide appears as black crystals with a slight ‘iodine’-like odour. When heated to decomposition, it may emit toxic fumes of iodine and oxides of nitrogen. Anhydrous cobalt (II) iodide is sometimes used to test for the presence of water in various solvents. Cobalt (II) iodide is used as a catalyst, for example, in carbonylations. It catalyses the reaction of diketene with Grignard reagents, useful for the synthesis of terpenoids.

• 化学的特性

  Brownish red crystalline powder

• 物理的性質

  Exists in two isomorphous forms, α- and ?-forms; both modifications highly hygroscopic. The α-form is black hexagonal crystal; density 5.58 g/cm³; turns dark green in air; melts at 560°C; disolves in water giving pink coloration. The α-forms sublimes in vacuo, partly forming an isomorous yellow modification-the anhydrous β-form.
  The β-modification is a yellow powder; density 5.45 g/cm³; converts to the α-form when heated to 400°C; absorbs moisture from air, the yellow powder becoming green droplets; dissolves readily in water forming a colorless solution which turns pink on heating.
  The hexahydrate is red hexagonal crystals; density 2.90 g/cm³; loses water at 130°C giving anhydrous iodide; soluble in water, ethanol, acetone, chloroform and ether, forming colored solutions, (while the aqueous solution is red below 20°C and green above this temperature; the salt forms blue solution in ethanol, chloroform and ether).

• 使用

  Cobalt(II) iodide is used as a moisture and humidity indicator. It is also used as a catalyst.

• 製造方法

  Cobalt(II) iodide is prepared by heating cobalt powder in a stream of hydrogen iodide at 400 to 450°C:
  Co + 2HI → CoI₂ + H₂
  The product obtained is the black crystalline α-form.
  Cobalt(II) iodide also may be made by heating cobalt powder with iodine vapor.

• Structure and conformation

  Cobalt(II) iodide crystallizes in two polymorphs, the α- and β-forms. The α-polymorph comprises black hexagonal crystals, which turn dark green when exposed to air. Under vacuum at 500℃, samples of α-CoI2 sublime, forming the β-polymorph as yellow crystals. β-CoI2 also easily absorbs moisture from the air, converting into green hydrate. Below 400℃, β-CoI2 reverts back to the α-form. The anhydrous salt has the cadmium halide structure. The hexaaquo salt comprises separated [Co(H2O)6] 21 and iodide ions.

コバルト(II)ジヨージド 生産企業

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