Lithium hydride [ 7580-67-8 ]

Glass shape colorless transparent solid. Commodity is usually grey powder. The relative density 0.78. Melting point ℃ 688. The boiling point ℃ (> 700 decomposition). Encounter light quickly turn grey. Under normal temperature in dry air does not decompose, and water happen catabolic reactions into lithium hydroxide monohydrate and hydrogen. At room temperature and chlorine, oxygen and hydrogen does not occur role. Under high temperature pyrolysis can occur. Dissociation pressure in 500 ℃ 0.7 for ℃ mmHg, 850 7.6 mmHg. KJ/hot melt 22.59 mol; Soluble in ether, insoluble in benzene, toluene. Used as desiccant, hydrogen happen agent and organic synthesis reductant