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. They are also employed in immunoassays, where they act as solid supports for the immobilization of antibodies or antigens, facilitating the detection of specific biomolecules. In diagnostics, polystyrene latex beads are used in agglutination tests to detect the presence of pathogens or antibodies in patient samples. Their surface can be modified with functional groups, enabling the attachment of proteins, DNA, or other molecules for targeted applications. Additionally, these beads are utilized in material science as model colloids to study phenomena like particle aggregation, sedimentation, and self-assembly. In industrial settings, they are incorporated into coatings, adhesives, and composites to enhance properties such as strength, durability, and texture. Their consistent size and surface characteristics make them valuable tools across diverse fields.