Used primarily in immunology and histology for preserving and stabilizing biological samples. It is commonly employed in immunofluorescence and immunohistochemistry techniques to maintain tissue integrity and antigenicity during staining procedures. The buffer helps in preventing degradation of samples, ensuring accurate and consistent results in microscopic analysis. It is also utilized in the preparation of agarose gels for electrophoresis, providing a stable medium for the separation of proteins and nucleic acids. Additionally, it supports the growth and maintenance of certain cell cultures in vitro, making it a versatile tool in biomedical research.