4-Phenylpyridine from Mexico
4-Phenylpyridine serves as an intermediate for pharmaceuticals and liquid crystal materials, featuring an unfused pyridine ring with phenyl substitution. Classified in HTS 2933.39.61.91 as a note 3 substance meeting heterocyclic nitrogen compound criteria. Chemically defined without excluded Chapter 29 mixtures or preparations.
Duty Rate — Mexico → United States
110%
Rate breakdown
9903.04.6093.5%Except as provided in heading 9903.04.61, patented pharmaceutical articles as provided for in subdivisions (c) and (d) of U.S. note 40 to this subchapter
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Include synthesis route declaration to verify not DEA controlled substance precursor
• Specify melting point (78-80°C) and HPLC purity in certificate of analysis
• Ensure proper ventilation labeling for sublimation hazard during storage