Technical Buffer Solution pH 9.21 is manufactured by Reagecon. Technical buffers are used in laboratories and industries to calibrate and set the pH of pH meters and other equipment. Buffers are created using an aqueous solution of a weak acid and its conjugate base, or vice versa. The buffers manufactured by Reagecon have an unbroken chain of traceability to the IUPAC pH system. The buffers are designed such that they have a longer shelf-life and a greater stability. The technical buffer produced by Reagecon is tested at 25 C. These buffers are colour coded and they are ISO certified and NIST traceable. Manufacturer: Reagecon pH: 9.21 0.02 C Testing Temperature: 25 C Quality Standards: ISO 17025, ISO 9001:2008 certified Volume: 1000 mL