Calcium hydride is an inorganic compound, the chemical formula is CaH2, is a white crystalline powder, insoluble in carbon disulfide, slightly soluble in concentrated acid. Calcium hydride has strong reducibility, which can free the metals of brief oxides and chlorides. At room temperature, calcium hydride can react with water to produce calcium hydroxide and hydrogen, which are mainly used as reducing agents, desiccant, chemical analysis reagents and so on. Calcium hydride is an alkaline earth metal hydride. Calcium hydride can be used to produce hydrogen. It is often used in the laboratory to produce small amounts of high-purity hydrogen for experimental use. At the same time, we also produce low-nitrogen calcium hydride, which has an off-white appearance as powder or particles and is used as a reducing agent and shrinking agent in organic synthesis, as a desiccant and as a hydrogen production material.