重クロム酸 化学特性,用途語,生産方法
解説
重クロム酸，化学式 H2Cr2O7 。遊離の状態では得られず，酸化クロム(VI) CrO3の水溶液中でクロム酸H2CrO4と平衡を保っていることが知られている。このときCrO3の濃度が低ければH2CrO4のほうが多く，濃度が高くなるとH2Cr2O7のほうが多くなる。さらに濃度が高くなると，三クロム酸H2Cr3O10，四クロム酸H2Cr4O13などが存在することになる。
株式会社平凡社世界大百科事典 第２版について
反応プロフィール
dichromic acid is a very powerful oxidizing agent, confirmed human carcinogen. Upon contact with reducing reagents dichromic acid can cause a violent explosion, in contact with organic matter dichromic acid may cause a violent oxidation leading to ignition. Dangerously reactive with acetone, alcohols, alkali metals (sodium, potassium), ammonia, arsenic, dimethylformamide, hydrogen sulfide, phosphorus, peroxyformic acid, pyridine, selenium, sulfur, and many other chemicals [Sax, 9th ed., 1996, p. 852]. When mixed with sulfuric acid for glass cleaning operations, used solution in closed bottle may explode due to internal pressure of carbon dioxide arising from contamination by carbon compounds [Bryson, W. R., Chem. Brit., 1975, 11, p. 377].
健康ハザード
Toxic by ingestion. Inhalation of dust is toxic. Fire may produce irritating, corrosive and/or toxic gases. Contact with substance may cause severe burns to skin and eyes. Runoff from fire control or dilution water may cause pollution.
火災危険
These substances will accelerate burning when involved in a fire. May explode from heat or contamination. Some may burn rapidly. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard.
重クロム酸 上流と下流の製品情報
原材料
準備製品