Polystyrene standard is widely used in analytical chemistry as a calibration tool in gel permeation chromatography (GPC) and size exclusion chromatography (SEC). It helps determine the molecular weight distribution of polymers by providing a reference for comparison. This is crucial for quality control in polymer production, ensuring consistency and performance of materials like plastics, rubbers, and coatings. Additionally, it is employed in research and development to study polymer behavior, degradation, and interactions in various solvents. Its well-defined molecular weight and structure make it an essential tool for accurate and reliable polymer characterization.