Carboxylated polystyrene latex particles of blue are widely used in various scientific and industrial applications due to their unique properties. These particles are commonly employed in diagnostic assays and biomedical research as labeling agents or tracers. Their blue color makes them easily detectable, which is particularly useful in immunoassays, flow cytometry, and microscopy for visualizing and tracking biological processes.

In addition to biomedical applications, these particles are utilized in calibration standards for particle size analyzers and flow cytometers, ensuring accurate measurements in laboratory instruments. They also serve as model systems in colloidal science and material research to study particle behavior, surface interactions, and dispersion stability.

Furthermore, carboxylated polystyrene latex particles of blue are incorporated into coatings, inks, and paints for color consistency and quality control. Their uniform size and surface functionalization make them valuable in nanotechnology and polymer science for developing advanced materials with tailored properties.