Latex beads made of polystyrene are widely used in various scientific and industrial applications due to their uniform size, stability, and surface properties. They are commonly employed in biomedical research as calibration standards for flow cytometry and microscopy, helping to ensure accurate instrument performance. These beads are also utilized in immunoassays, where they serve as solid supports for attaching antibodies or antigens, enhancing the detection of specific biomolecules. In diagnostics, they play a critical role in tests like latex agglutination assays, where they help identify pathogens or antibodies in patient samples. Additionally, polystyrene latex beads are used in material science as model systems for studying colloidal behavior, particle interactions, and self-assembly processes. Their versatility and consistency make them valuable tools in both research and practical applications.