Sheath Fluid (8×) is primarily used in flow cytometry, a technique for analyzing the physical and chemical characteristics of particles in a fluid as it passes through a laser. In this application, the fluid serves to hydrodynamically focus the sample stream, ensuring that cells or particles pass through the laser beam one at a time. This precise alignment is critical for accurate measurement and sorting of cells based on their properties, such as size, granularity, and fluorescence. The 8× concentration indicates a highly concentrated formulation, which is typically diluted before use to achieve the optimal viscosity and flow rate required for the specific instrument. It is essential for maintaining the stability and integrity of the sample during analysis, making it a key component in research, clinical diagnostics, and immunology studies.