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HSChapter 29
U.S. exports of n-phenethyl-4-piperidone (npp) (HS 293337) totaled $32K in December 2025, traded with 1 country.
NPP is a controlled precursor chemical closely monitored under international drug-control frameworks because it is a direct synthetic precursor to fentanyl and related illicit opioids. Imports enter under a single 10-digit line (2933370000), and shipments are subject to DEA scheduling requirements in addition to standard CBP entry procedures. France is the leading documented US supplier, reflecting that country's established pharmaceutical-grade chemical manufacturing base. Importers must maintain rigorous chain-of-custody documentation and DEA registration to receive this substance lawfully.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Because NPP is a List I chemical under the Controlled Substances Act, importers must hold a valid DEA importer registration and file advance import declarations. Failure to comply can result in seizure and criminal liability. Consult a licensed customs broker and DEA-registered legal counsel before attempting importation.
NPP is classified under a single dedicated tariff line, 2933370000, with no further subdivision. Because the heading is product-specific, misclassification risk is low, but the controlled-substance overlay makes documentation accuracy critical.
Supplier Network
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Monthly import values over time
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2933370000 | N-PHENETHYL-4-PIPERIDONE (NPP) | $203K |
NUCLEIC ACIDS & SALTS; OTHER HETEROCYCLIC CMP, NES
HS 293499
POLYPEPTIDE PROTEIN& GLYCOPROTEIN HORMONES &DERIV
HS 293719
CMPDS CONT AN UNFUSED PYRIDINE RING ETC NESOI
HS 293339
BENZENE
HS 290220
HETEROCYCLIC COMP W NITROGEN HETERO-ATM ONLY NESOI
HS 293399
HETEROCYCLIC COMP WITH UNFUSED PYRAZOLE RING NESOI
HS 293319
| Country | Imports | Exports | Balance |
|---|---|---|---|
| SAUDI ARABIA | -- | $203K | +$203K |
| MEXICO | -- | -- | -- |
| FRANCE | -- | -- | -- |
| State | Imports | Exports | Balance |
|---|---|---|---|
| New York | -- | $203K | +$203K |
| New Jersey | -- | -- | -- |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| JFK INTERNATIONAL AIRPORT, NY | -- | $203K | +$203K |
| LAREDO, TX | -- | -- | -- |