Lithium chloride solution is widely used in air conditioning and humidity control systems due to its strong hygroscopic nature. It effectively absorbs moisture from the air, making it valuable in industrial dehumidifiers, especially in environments requiring precise humidity levels such as pharmaceutical manufacturing and electronics production. It is also employed in the chemical industry as a catalyst or reagent in organic synthesis, including polymerization reactions. In laboratories, lithium chloride solution is used for RNA isolation because it helps separate RNA from DNA and proteins. Additionally, it finds application in the preparation of lithium metal through electrolysis, serving as a component in molten salt electrolytes. Its ability to alter the solubility of certain biomolecules makes it useful in biochemical research and biotechnology processes.