Lithium aluminum hydride is a metal hydride, the chemical formula is LiAlH4, is a white crystalline powder, insoluble in hydrocarbons, soluble in ether, tetrahydrofuran. Lithium aluminum hydride is mainly used as carbonyl reagent and reducing agent. It can reduce halogenated alkanes to alkanes, silanes to silanes, carbonyl compounds to alcohols, amides and imides to amines, nitriles to primary amines, and epoxides. Lithium aluminum hydride has strong reducing property, can react with many organic compounds, and is often used as a strong reducing agent in organic synthesis. It can reduce ketones, aldehydes, esters and other functional groups, so as to synthesize alcohols and amines. In addition, it is also commonly used in the preparation of metal aluminum and lithium alloys.