NPP Custom Synthesis Intermediate from Mexico
Custom-produced N-Phenethyl-4-piperidone for specific pharmaceutical campaigns, verified by HPLC to match HTS 2933.37.00.00 specifications. Contains unfused piperidone ring as core heterocyclic structure. Documented chain of custody for controlled precursor.
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
• Customer qualification letter specifying synthetic route using NPP required for DEA
• GMP certificate if for API production; otherwise research grade documentation
• Verify no prohibited downstream products in import declaration