Buffer and Saline Preparation: 5M Sodium Chloride is used to rapidly adjust ionic strength and osmolarity in buffers (e.g., PBS, TBS) and to prepare isotonic saline by dilution.

Protein Chromatography: Employed to set binding and elution salt concentrations in ion-exchange and hydrophobic interaction chromatography.

Nucleic Acid Precipitation and Cleanup: Provides salt for DNA/RNA precipitation and wash steps during purification workflows.

Nucleic Acid Hybridization Buffers: Used to formulate and adjust salt levels in SSC/SSPE for hybridization and wash conditions.

Immunoassay and Western Blot Wash Buffers: Added to TBS/TBST to maintain physiological ionic strength and reduce nonspecific binding.

Cell Culture and Osmolarity Adjustment: Utilized to prepare endotoxin-controlled saline and buffers for mammalian cell workflows and sensitive assays.

Microbiology Media Formulation: Adjusts NaCl levels in culture media (e.g., LB, TSB) for organisms such as Escherichia coli.

Periplasmic Extraction/Osmotic Shock: Used to modulate ionic strength and osmotic conditions in protein release workflows.

Phage and Particle Precipitation: Provides the salt component in PEG/NaCl protocols for concentrating bacteriophages and macromolecular complexes.

Protein Stability and Storage: Maintains ionic strength in enzyme and protein storage buffers to support structural stability.