水素
Hidrógeno · Водород · هيدروجين · Wasserstoff · Hydrogen · Hydrogène · Idrogeno · 수소 · Hydrogenium · Waterstof · Wodór · Hidrogénio
| CAS | 1333-74-0 |
|---|---|
| EC | 215-605-7 |
| UN | 1049 |
| 化学式 | H2 |
| モル質量 | 2.016 g/mol |
| 爆発下限界（LEL） | 4.0 % vol |
| 爆発上限界（UEL） | 77.0 % vol |
| 発火温度 | 560 °C |
| 温度等級 | T1 |
| ガスグループ | IIC |
| ガスまたは蒸気の相対密度（空気 = 1） | 0.0696 |
| GHS | 危険 · H220 |
Dihydrogen is an elemental molecule consisting of two hydrogens joined by a single bond. It has a role as an electron donor, an antioxidant, a fuel, a human metabolite and a member of food packaging gas. Hydrogen is a colorless, odorless gas. It is easily ignited. Once ignited it burns with a pale blue, almost invisible flame.