Buffer Solution pH 4.00 is manufactured by Reagecon. pH Buffers are routinely used in laboratories for maintaining an ideal pH environment. It is incorporated into reagents during nucleic acid extraction, gel electrophoresis, PCR and other protocols so that the enzymes and proteins within the system work optimally. pH Buffers have the ability to resist a change in pH. It is composed of a weak acid and its conjugate base, or vice versa. Some of the commonly used biological buffers include MOPS, Citrate, Tris etc. Reagecon produces buffers which confer to the IUPAC pH scale standards and offers traceability for consistent and universally accepted results. The buffers are manufactured such that they are stable and provide a long shelf life. The pH 4.00 buffer is colourless. It is tested at 25 C Manufacturer: Reagecon pH: 4.00 0.01 Quantity: 1000 mL Quality Assurance: ISO 17025 and ISO 9001:2008 certified.