Commonly used buffer. Often used to provide a buffer system to maintain cell culture media in the physiological pH range.100 tablets.
Add one tablet per 100ml of purified water for a 1X solution of PBS, pH 7.4: Sodium chloride: 137 mM, Potassium chloride 2.7 mM, Phosphate buffer 11.9 mM.
Understanding purity and quality - a guide for life scientists 
