| M Formula: | UH3 |
| Properties: | |
| Brown-gray to black powder. D 10.92, conductor of electricity. | |
| Derivation: | |
| Action of hydrogen on hot uranium. | |
| Hazard: | |
| Highly toxic. Ignites spontaneously in air. | |
| Use: | |
| Preparation of finely divided uranium metal by decomposition, separation of hydrogen isotopes, reducing agent, laboratory source of pure hydrogen. | |