Used as a solid support in organic synthesis and catalysis due to its robust cross-linked structure and functional sites. The pyridine groups act as ligands or bases, making it suitable for metal coordination in catalytic reactions. Commonly employed in scavenging applications to remove acidic impurities or metal ions from reaction mixtures. Also utilized in the preparation of ion-exchange resins and as a stationary phase in chromatography. Its insolubility and reusability enhance its utility in continuous flow systems and industrial processes.