カルシウムジシアニド

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

  H300：飲み込むと生命に危険

  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

  P264：取扱い後は皮膚をよく洗うこと。

  P264：取扱い後は手や顔をよく洗うこと。

  P270：この製品を使用する時に、飲食または喫煙をしないこ と。

  P273：環境への放出を避けること。

  P301+P310：飲み込んだ場合：直ちに医師に連絡すること。

  P321：特別な処置が必要である（このラベルの．．． を見よ）。

  P330：口をすすぐこと。

  P391：漏出物を回収すること。

  P405：施錠して保管すること。

  P501：内容物/容器を．．．に廃棄すること。

カルシウムジシアニド 化学特性,用途語,生産方法

• 解説

  シアン化カルシウム，カルシウムのシアン化物。カルシウムシアナミド（石灰窒素の主成分）と炭素に融剤として塩化ナトリウムを加え、1000℃以上に加熱後、急冷して製造する。化学式Ca(CN)2、式量92.1。

  　　CaCN2＋C―→Ca(CN)2

  無色の粉末で、水に容易に溶け加水分解する。酸によって分解しシアン化水素を発生する。350℃で分解しカルシウムシアナミドと炭素とに戻る。鉄（Ⅱ）塩と反応してヘキサシアノ鉄（Ⅱ）酸塩を与えるので、フェロシアン化カリウム（黄血塩）の製造に用いられる。そのほか金、銀の抽出（青化法）、殺虫剤などの用途がある。猛毒で、空気中の水分および二酸化炭素によってシアン化水素を発生するので、密栓して保存しておく必要がある。

• 用途

  主として燻蒸剤、また肥料、枯れ葉剤、除草剤、殺鼠剤、セメントの安定剤として、ステンレススチールの製造に利用される。

• 説明

  Calcium cyanide is used mainly for the extraction or cyanidation of gold and silver ores. It is also used in the production of prussiates or ferrocyanides, in the froth flotation of minerals, in processes where gold complexes are adsorbed on carbon, in the manufacture of stainless steel, as a fumigant and rodenticide, and as a cement stabiliser. The main users of cyanides are the steel, electroplating, mining, and chemical industries. The principal cyanide compounds used in industrial operations are potassium and sodium cyanide and calcium cyanide, particularly in metal leaching operations. Cyanides have been well established in uses as insecticides and fumigants; in the extraction of gold and silver ores; in metal cleaning; in the manufacture of synthetic fibres, various plastics, dyes, pigments, and nylon; and as reagents in analytical chemistry. Calcium cyanide decomposes on heating above 350°C, producing toxic fumes including nitrogen oxides and HCN. It reacts violently with water, moist air, carbon dioxide, acids, and acid salts producing highly toxic and flammable HCN. It reacts violently when heated with oxidising substances causing fire and explosion hazard.

• 化学的特性

  Calcium cyanide is a white crystalline solid or powder. Odor of hydrogen cyanide.

• 使用

  Calcium cyanide is used for the extraction of gold and silver from their ores, in the froth flotation of minerals, as a fumigant, and as a rodenticide.

• 調製方法

  Calcium cyanide is made commercially from lime, calcium oxide, coke, and nitrogen. The reactions are carried out in an electric furnace. The resulting melt is cooled rapidly to prevent reversion to calcium cyanamide. The product is marketed in the form of flakes, which are dark gray because of the presence of carbon. The extraction or cyanidation of precious-metal ores was the first and is still the largest use for calcium cyanide.

• 一般的な説明

  White crystals or powder or gray-black powder (technical grade). Toxic by skin absorption through open wounds, by ingestion, and by inhalation.

• 空気と水の反応

  Water soluble with evolution of some hydrogen cyanide, a flammable poison gas. Release of gas is much more rapid if acid is present.

• 反応プロフィール

  CALCIUM CYANIDE gives weakly acidic solutions. Contact with acids causes rapid evolution of hydrogen cyanide. Incompatible with isocyanates, nitrides, and peroxides. May react rapidly with oxidizing agents.

• 危険性

  Toxic by ingestion and skin absorption.

• 健康ハザード

  Calcium cyanide is a highly poisonous compound to humans, animals, and fish. The toxic routes are ingestion, skin contact, and inhalation of the dust. It forms HCN readily when it reacts with CO2 or water. This makes it highly hazardous, more so than the alkalimetal cyanides, although the LD50 value of Ca(CN)2 is greater than the sodium or potassium cyanides.
  LD50 value, oral (rats): 39 mg/kg.

• 火災危険

  Special Hazards of Combustion Products: Decomposes in fire to give very toxic gases, including hydrogen cyanide.

• 安全性プロファイル

  A deadly poison by ingestion and probably other routes. When heated to decomposition it emits toxic fumes of NO, and CN-. See also CALCIUM COMPOUNDS and CYANIDE

• 職業ばく露

  Calcium cyanide is used as a fumigant; as a rodenticide; in leaching precious metal ores; in the manufacture of stainless steel; and as a stabilizer forcement. Used as raw material for production of nitrogenous compounds and in treatment of alcoholism

• 貯蔵

  Calcium cyanide is stored in tight containers free from moisture. Proper ventilation and protective equipment should be used while handling the solid or while preparing an aqueous solution. It is shipped in mild-steel or fiber drums.

• 輸送方法

  UN1575 Calcium cyanide, Hazard Class: 6.1; Labels: 6.1-Poisonous materials

• 不和合性

  Contact with water, acids, acidic salts; moist air, or carbon dioxide, forms highly toxic and flammable hydrogen cyanide. Incompatible with fluorine, magnesium. Reacts violently when heated with nitrites, nitrates, chlorates, and perchlorates. Calcium cyanide decomposes in high heat forming hydrogen cyanide and nitrous oxides fumes

• 廃棄物の処理

  Add cyanide waste to strong alkaline sodium hypochlorite. Let stand 24 hours then flush to sewage plant.

カルシウムジシアニド 上流と下流の製品情報

592-01-8, カルシウムジシアニド キーワード