Latex beads made of polystyrene are widely used in various scientific and industrial applications due to their uniform size, stability, and versatility. In biomedical research, they serve as calibration standards for flow cytometry and microscopy, helping to ensure accurate instrument performance. These beads are also employed in diagnostic assays, such as immunoassays, where they act as solid supports for capturing and detecting target molecules like antibodies or antigens. In addition, they are utilized in cell sorting and separation techniques, enabling the isolation of specific cell populations. Beyond the biomedical field, polystyrene latex beads are used in material science for creating model systems to study colloidal behavior, particle interactions, and self-assembly processes. Their consistent size and surface properties make them valuable in coatings, adhesives, and as additives in composite materials to enhance mechanical or optical properties.