SUMMARY, EXPLANATION AND LIMITATIONS:
The Phosphate Buffered Saline 10X concentrated is an aqueous solution. On dilution, the resultant 1X PBS buffer will have final concentration: 137 mM Sodium Chloride, 10 mM Phosphate, 2,7 mM Potassium Chloride, pH 7,4.
PBS buffer has many uses like an isotonic and non-toxic buffer to cells. These uses include substance dilution and cell container rinsing.