Used as a buffering agent in biological and biochemical research due to its effective pH range between 6.5 and 7.9. Commonly applied in cell culture media, protein purification, and enzyme assays where stable pH conditions are critical. Also utilized in electrophoresis, particularly in RNA and DNA separation techniques, because it maintains pH during prolonged runs and does not interfere with nucleic acid integrity. Compatible with many biological systems and does not readily cross cell membranes, making it suitable for intracellular-like environments in vitro.