Biological buffers, introduced by N.E. Good in 1966, are widely used in biotechnology, cell biology and molecular biology applications. These buffers were well received by the research community because "Good" buffers are nontoxic, easy to purify and their pKa is typically between 6.0 and 8.0, the range at which most biological reactions occur. The "Good" buffers also feature minimal penetration of membranes, minimal absorbance in the 240-700 nm range and minimal effects due to salt, concentration or temperature.
Welton offers a complete line of Biological buffers.