Lithium hydride CAS 7580-67-8 99% purity as reducing agent
Product Description
Lithium hydride is an off-white to grayish,translucent, odorless solid or white powder that darkens rapidly on exposure to light. Molecular weight = 7.95; Specificgravity (H2O:1)=0.78; Boiling point = 850℃ (decomposesbelow BP); Freezing/Melting point = 689℃; Autoignitiontemperature = 200℃. Hazard Identification (based onNFPA-704 M Rating System): Health 3, Flammability 4,Reactivity 2. A combustible solid that can form airbornedust clouds which may explode on contact with flame, heat,or oxidizers.
Product Properties
Lithium hydride (LiH) is a crystalline salt substance(face-centered cubic) that is white in its pure form, As an engineering material, it has properties of interest in many technologies. For example,the high hydrogen content and light weight of LiH make it useful for neutron shields and moderators in nuclear power plants. In addition, the high heat of fusion combined with light weight make LiH appropriate for heat storage media for solar power plants on satellites and may be used as a heat sink for different applications. Typically, processes for production of LiH involve handling of LiH at temperatures above its meltingpoint (688 DC). Type 304L stainless steel is utilized for many process components handling molten LiH.
Lithium hydride is a typical ionic hydride with lithium cations and hydride anions. Electrolysis of molten material results in formation of lithium metal at the cathode and hydrogen at the anode. The lithium hydride-water reaction, which results in the release of hydrogen gas, is also indicative of a negatively charged hydrogen.
Lithium hydride is an off-white to grayish, translucent, odorless solid or white powder that darkens rapidly on exposure to light. Pure lithium hydride forms colorless, cubic crystals. The commercial product contains traces of impurities, e.g., unreacted lithium metal, and is consequently light gray or blue. Lithium hydride is thermally very stable, being the only ionic hydride that melts without decomposition at atmospheric pressure (mp 688 ℃). In contrast to the other alkali metal hydrides, lithium hydride is slightly soluble in inert polar organic solvents such as ethers. It forms eutectic mixtures with a large number of salts. Lithium hydride is stable in dry air but ignites at increased temperature. In moist air it is hydrolyzed exothermically; finely divided material can ignite spontaneously. At elevated temperature, it reacts with oxygen to form lithium oxide, with nitrogen to form lithium nitride and hydrogen, and with carbon dioxide to form lithium formate.
Application
Lithium hydride is used in the manufactureof lithium aluminum hydride and silane, as apowerful reducing agent, as a condensationagent in organic synthesis, as a portablesource of hydrogen, and as a lightweight nuclear shielding material. It is now beingused for storing thermal energy for spacepower systems .
Lithium hydride is a bluish-white crystal that is flammable in moisture. Used as a source of hydrogen gas that is liberated when LiH becomes wet. LiH is an excellent desiccant and reducing agent as well as a shield that protects from radiation created by nuclear reactions.
Packing & Storage
Packing: 100g/ tin can; 500g/ tin can; 1kg per tin can; 20kg per iron drum
Storage: It can be stored in metal cans with outer cover for protection, or in metal drums to prevent mechanical damage. Store in a separate, cool, dry and well-ventilated place, and strictly prevent moisture. Buildings must be well-ventilated and structurally free from gas accumulation.
Transportation information
UN number: 1414
HazardClass : 4.3
PackingGroup : I
HS CODE: 28500090
Specification
| Name | Lithium hydride | ||
| CAS | 7580-67-8 | ||
| Items | Standard | Results | |
| Appearance | Off-white crystalline powder | Conforms | |
| Assay, % | ≥99 | 99.1 | |
| Conclusion | Qualified | ||
