Cell Culture Washing: Rinses adherent or suspension cells without Ca/Mg to minimize cell-cell adhesion prior to trypsinization or passaging.

Reagent and Sample Dilution: Isotonic diluent for antibodies, dyes, enzymes, and cells, maintaining pH 7.4 with phosphate buffering.

Flow Cytometry: Wash and resuspension buffer (often with 0.1–2% BSA and/or EDTA) to reduce clumping and preserve scatter profiles.

Immunoassays (ELISA/Western Blot): Base for PBS-T wash buffers and sample dilution to reduce nonspecific binding.

Microscopy/Immunofluorescence: Rinses and antibody incubation buffer to maintain osmolarity and pH without interfering divalent cations.

Cell Counting: Hemocytometer/automated counter resuspension buffer for accurate viability and counts.

Tissue Handling: Isotonic rinse during dissection and processing to remove serum/media and maintain physiological conditions.

Nucleic Acid/Protein Workflows: General isotonic buffer for gentle washing and sample handling where Tris or Ca/Mg would be detrimental.

Preparation of 1X DPBS: Dilute 10X concentrate to 1X for routine laboratory use; filter-sterilize if sterility is required.

General Laboratory Washing: Rinsing labware and cells to remove residual enzymes, serum, or inhibitors without introducing Ca/Mg.