Cell Culture Washing and Resuspension: Maintains isotonic conditions for rinsing adherent and suspension cells without disrupting membrane integrity.

Antibody-Based Assays (ELISA/Western Blot): Used as a wash buffer and antibody diluent to reduce nonspecific binding during immunoassays.

Flow Cytometry: Serves as a staining and wash buffer to preserve cell viability and scatter properties.

Immunofluorescence and Immunohistochemistry: Provides stable pH during fixation, blocking, and wash steps for consistent signal.

Microscopy and Imaging: Supports live and fixed cell imaging by maintaining physiological osmolarity and pH.

General Sample and Reagent Dilution: Used to dilute proteins, antibodies, and analytes where physiological ionic strength and pH 7.2 are required at 1X.

Tissue and Cell Transport/Storage: Buffers specimens short-term to minimize osmotic stress and pH shifts.

Bacterial Cell Handling: Employed for washing and resuspending pellets of Escherichia coli and other laboratory strains.

Cell Counting and Viability Assays: Rinses and suspends cells for hemocytometer or automated counter measurements.

Preparation of Additives and Stock Solutions: Solvent for salts and additives requiring phosphate buffering and physiological saline at 1X.