Potassium phosphate buffer solution is widely used in biological and biochemical research to maintain a stable pH environment. It is essential in various laboratory procedures, including enzyme assays, protein purification, and cell culture experiments, where precise pH control is critical for accurate results. In molecular biology, it is commonly employed in DNA and RNA extraction protocols, as well as in gel electrophoresis to ensure optimal conditions for nucleic acid separation. The buffer also plays a key role in immunohistochemistry and immunofluorescence techniques, where it helps preserve antigen integrity during tissue processing and staining. Additionally, it is utilized in pharmaceutical formulations to stabilize drugs and maintain their efficacy. In microbiology, it supports the growth of microorganisms in culture media by providing a consistent pH. Its versatility and reliability make it a fundamental component in scientific and industrial applications requiring pH regulation.