Ficoll PM 70 is widely used in biological research for density gradient centrifugation, particularly in the separation of cells, organelles, and macromolecules. It is especially valuable in isolating lymphocytes and other mononuclear cells from whole blood, making it a key component in immunology and cell biology studies. Its high molecular weight and low osmolarity allow for efficient separation without damaging cellular structures. Additionally, it is employed in the preparation of samples for flow cytometry, cell culture, and other analytical techniques. Ficoll PM 70 is also used in plant biology for protoplast isolation and in virology for purifying viral particles. Its versatility and gentle separation properties make it a preferred choice in various laboratory applications.