INTRODUCTION
Lithium bromide (LiBr) is a white, hygroscopic solid. The hygroscopic nature makes it a versatile chemical that can be put to various end uses. It is usually sold in anhydrous form or in aqueous solutions of varying concentrations.
Manufacture
The salt is produced by reaction between lithium carbonate and hydrobromic acid. Alternatively, it is also produced by bromination of lithium hydroxide.
| Synonyms | Lithium monobromide Hydrobromic acid lithium salt |
| CAS no. | 7550-35-8 |
| EINECS no. | 231-439-8 |
| Molecular formula | LiBr |
| Molecular weight | 86.85 |
| Structure | LiBr |
APPLICATIONS
Medicinal Uses
LiBr acts as sedative and is used in treatment of bipolar disorders. It is also a medical humectant.
Air Conditioning
The bromide finds its major application in some air conditioning systems, whereby its 55-60% aqueous solution is used as desiccant (phenomenon of absorption chilling).
Chemical Processes
The salt is further applied in various processes such as:
| Absorption of water vapors (vapor absorption media) |
| Catalyst in dehydrogenation reactions |
| Low temperature heat exchange processes |
| Carbonyl compound condensations with active methylene compounds |
| Some alkylation reactions |
| Inexpensive catalyst in epoxide ring opening using amines |
| Deprotonation and dehydration of organic molecules possessing acidic protons |
| Purification of steroids |
Others
Reconstitution of brines, electrolyte component in Li batteries, and welding flux are some of the feeble uses of LiBr.
SPECIFICATIONS
| Test | Unit | Specifications |
|---|---|---|
| Appearance | – | White to off-white hygroscopic powder |
| Solubility | – | Soluble in water |
| Assay | % | Min 99.0 |
| pH of 10% aqueous solution | – | 7.5 – 10.5 |
| Loss on drying | % | Max 1.0 |
STORAGE
The product is stored at ambient temperature.
PACKING
50 kg HDPE drum
REACH Status
Not registered yet
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