Used in biochemical and molecular biology laboratories to maintain a stable pH environment during enzymatic reactions, particularly in DNA and RNA extraction protocols. Its buffering capacity ensures optimal conditions for enzyme activity, such as in reverse transcription or restriction enzyme digestion. Commonly applied in electrophoresis and chromatography techniques where consistent pH is critical. Also utilized in cell lysis buffers and sample preparation for nucleic acid purification. The lithium ion can enhance solubility of certain biomolecules, improving yield and purity in isolation processes.