10xPBS dry pack , Biotechnolgy Grade, 1 pack for 1LContents of 1 pouch dissolved in deionized water to make 1L10x PBS.After 9:1 dilution it is made up to 10 L and yields: 0.01 M phosphate buffer, 0.0027 M potassium chloride, 0.14 M sodium chloride, pH 7.4 at 25