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This category focuses on various chemical reagents (such as solvents, catalysts, ligands, condensing agents, etc.) used in drug synthesis processes and their reaction conversion products. Although these "code impurities" are not the main reaction materials, they may remain in intermediates or final products, affecting drug safety. We provide a variety of reagent-related impurity reference standards, including noble metal catalyst residues, organic reagent degradation products, ligand derivatives, etc. All products have undergone rigorous purification and structural confirmation, enabling you to trace the whereabouts of reagents in the process, evaluate their removal efficiency, and establish analytical methods that meet ICH Q3C (residual solvents) and elemental impurity control requirements, thereby improving quality control throughout the entire lifecycle of drugs.
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