Lithium bromide is a chemical compound with the molecular formula LiBr. It is a white crystalline solid that is highly soluble in water and has a salty taste. Lithium bromide is used primarily as an absorbent for air conditioning and refrigeration systems, where it is used to absorb water vapor from the air. It is also used in the synthesis of organic compounds, as a catalyst for certain chemical reactions, and as a corrosion inhibitor in steam boilers. Lithium bromide is considered a relatively safe chemical, but it can be toxic if ingested or inhaled in large quantities.