N-Phenethyl-4-piperidone (NPP) Pure Chemical from China
N-Phenethyl-4-piperidone (NPP) is a heterocyclic compound containing an unfused piperidone ring (hydrogenated pyridine derivative) with a phenethyl substituent, precisely matching HTS 2933.37.00.00. This pure chemical form is used primarily as a chemical intermediate in pharmaceutical synthesis. It falls under Chapter 29 as a separate chemically defined organic compound with nitrogen hetero-atom(s) only.
Duty Rate — China → United States
112.5%
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
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 to this subchapter
Import Tips
• Verify List I chemical status with DEA; obtain import permit and Letter of Registration before shipment
• Provide detailed chemical analysis certificate confirming purity >98% and structure matching NPP specifications
• Avoid common pitfalls like mislabeling as generic piperidone; precise nomenclature prevents reclassification