Sample Dilution and Reconstitution: Used as an isotonic diluent for standards, reagents, and lyophilized materials to maintain physiological ionic strength.

Cell Handling and Washing: Employed for rinsing, resuspending, and counting mammalian cells without causing osmotic stress.

Microbial Resuspension and Serial Dilution: Utilized to resuspend and dilute bacterial cultures (e.g., Escherichia coli, Staphylococcus aureus) for plating and CFU enumeration.

Endotoxin-Sensitive Assays: Endotoxin tested for use as a matrix or diluent in LAL assays and other endotoxin-critical workflows.

Instrument and Column Equilibration: Applied for flushing, rinsing, and equilibrating labware, tubing, and certain chromatography components with a simple ionic solution.

Flow Cytometry and Microscopy: Serves as a cell suspension medium to preserve morphology during short-term analysis and imaging.

Osmolarity and Conductivity Controls: Provides a consistent ionic background for calibration, blanks, and control measurements.

Sample Transport and Preparation: Maintains isotonic conditions for short-term transport and preparation of biological samples in the lab.