氰化氢
Waterstofcyanide · Cyjanowodór · Cianeto de hidrogénio · Acid cianhidric · Синильная кислота · Цијановодонична киселина · Hidrojen siyanür · Синильна кислота · Sianid · Cyanure d'hydrogène · מימן ציאנידי · हाइड्रोजन सायनाइड
| CAS | 74-90-8 |
|---|---|
| EC | 200-821-6 |
| UN | 1051 |
| 分子式 | HCN |
| 摩尔质量 | 27.025 g/mol |
| 爆炸下限（LEL） | 5.4 % vol |
| 爆炸上限（UEL） | 46.0 % vol |
| 闪点 | -20 °C |
| 引燃温度 | 538 °C |
| 温度组别 | T1 |
| 气体组别 | IIB |
| 气体或蒸气的相对密度（空气 = 1） | 0.933 |
| GHS | 危险 · H224, H330, H400, H410 |
Hydrogen cyanide is a one-carbon compound consisting of a methine group triple bonded to a nitrogen atom. It has a role as a poison, an Escherichia coli metabolite and a human metabolite. Hydrocyanic acid, aqueous solution, with not more than 20% hydrogen cyanide is a clear colorless aqueous solution of a gas. Has a faint odor of almonds. Can evolve hydrogen cyanide gas, which is (barely) lighter than air.