Lithium hydride

Lithium hydride is an inorganic compound with the chemical formula HLi, consisting of lithium and hydrogen atoms. It is an ionic hydride where lithium exists as Li+ cations and hydrogen as H- anions. With a molecular weight of only 8 g/mol, it is one of the lightest metal hydrides. This compound serves as an important reducing agent and hydrogen source in various chemical applications, particularly in organic synthesis and materials science.

Lithium hydride is a white to gray crystalline solid at room temperature with a cubic crystal structure. It has a high melting point of approximately 688°C and decomposes rather than boils when heated further. The compound is highly reactive with water and moisture, producing hydrogen gas and lithium hydroxide. It has a density of about 0.78 g/cm³, making it less dense than water, and exhibits ionic conductivity at elevated temperatures.

Lithium hydride is primarily used as a powerful reducing agent in organic synthesis and metallurgy. It serves as a hydrogen source in chemical reactions and is employed in the production of other metal hydrides. The compound finds applications in nuclear technology as a neutron moderator and shield material. Additionally, it is used in specialized batteries, hydrogen storage systems, and as a desiccant for removing moisture from inert gas atmospheres in laboratory and industrial processes.

Lithium hydride must be handled with extreme caution due to its reactivity with moisture and air. Always wear appropriate personal protective equipment including safety goggles, chemical-resistant gloves, and protective clothing. Work in a dry, inert atmosphere using glove boxes or Schlenk techniques when possible. Ensure adequate ventilation to prevent hydrogen gas accumulation. Keep away from water, acids, and oxidizing agents. Have appropriate fire extinguishing equipment nearby and ensure personnel are trained in emergency procedures.

Lithium hydride must be stored in airtight, moisture-proof containers under an inert atmosphere such as argon or nitrogen. Keep containers tightly sealed and store in a cool, dry place away from water, acids, and oxidizing materials. Use appropriate secondary containment to prevent moisture exposure. Storage areas should be well-ventilated and equipped with appropriate fire suppression systems. Regular inspection of container integrity is essential, and inventory should follow first-in-first-out principles to maintain product quality.

Lithium hydride contact requires immediate action due to its corrosive nature. For skin contact, brush off solid material gently and rinse thoroughly with plenty of water for at least 15 minutes. For eye contact, flush immediately with clean water for at least 15 minutes and seek medical attention. If inhaled, move to fresh air immediately. Never use water on large spills as this generates flammable hydrogen gas. Seek immediate medical attention for all exposures and inform medical personnel of the specific chemical involved.

Lithium hydride disposal must follow strict regulatory guidelines due to its reactive nature. Small quantities can be carefully quenched with dry alcohol under controlled conditions, followed by gradual addition of water. Never dispose of in regular waste streams or pour down drains. Contact licensed hazardous waste disposal companies for proper treatment and disposal. Maintain detailed records of disposal activities. Empty containers may still contain residues and require professional decontamination before disposal according to local environmental regulations.

Lithium hydride is classified under ADR Class 4.3 (Dangerous when wet substances), Packing Group I, indicating high danger level during transport. It must be packaged in UN-approved containers with proper moisture barriers and inert gas protection. Transport vehicles require appropriate placarding and emergency equipment. Drivers need ADR certification for dangerous goods transport. Shipping documentation must include proper shipping names, hazard classes, and emergency contact information. Avoid transport during extreme weather conditions that could compromise packaging integrity.

Lithium hydride is subject to various chemical regulations including REACH registration requirements in Europe. It falls under CLP regulation for classification, labeling, and packaging, though specific harmonized classifications may vary. The compound requires proper safety data sheets and risk assessments for workplace use. It is not currently listed as a SVHC (Substance of Very High Concern). Transport regulations under ADR/RID apply for shipment. Users must comply with national occupational safety standards and environmental protection requirements in their respective countries.

Lithium hydride is available through OYSI, a specialized European distributor of technical chemicals serving industrial and research customers across Europe. As a professional chemical supplier, OYSI provides high-quality lithium hydride with proper documentation, safety data sheets, and regulatory compliance support. Our technical team can assist with product specifications, handling recommendations, and logistics coordination. Contact OYSI directly for availability, technical specifications, and pricing information tailored to your specific application requirements and location within Europe.