 | This article relies largely or entirely on a single source. (March 2024) |
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| IUPAC | Compressed hydrogen |
|---|---|
| Other names | Hydrogen under pressure, CGH2, CGH2 |
| UN number | 1049, Class 2 |
| IMO | 1049, Class 2.1 |
| DOT | 1049, Class 2.1 |
| ADR | 1049, Class 2.1 |
| IATA | 1049, Class 2.1 |
| WHMIS | A, B1 |
| RTECS | MW8900000 |
| PEL-OSHA | Simple asphyxiant |
| ACGIH TLV-TWA | Simple asphyxiant |
| Appearance | Colorless, odorless |
| LEL | 4 % |
| UEL | 75 % |
| Auto ignition | 500 °C (932 °F) |
Compressed hydrogen (CH2, CGH2 or CGH2) is the gaseous state of the element hydrogen kept under pressure. Compressed hydrogen in hydrogen tanks at 350 bar (5,000 psi) and 700 bar (10,000 psi) is used for mobile hydrogen storage in hydrogen vehicles.[1] It is used as a fuel gas.