N-Phenethyl-4-piperidone Ethanol Solution (10%)
A 10% solution of N-Phenethyl-4-piperidone (NPP) in ethanol, prepared as a normal and necessary method for safe transport. Under Chapter 29 Note 1(e), such solutions are classifiable with the solute if the solvent does not make the product suitable for a specific use. Ethanol is a general-purpose solvent, so the solution retains classification under this tariff item.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the solution is used for a specific purpose (e.g., as a reagent)
Specific-use solutions may be classified elsewhere.
If the ethanol content is denatured and the solution is not for chemical use
Denatured alcohol products fall under heading 2207.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide documentation proving the ethanol solution is solely for transport safety, not for a specific application
• State the solvent concentration and its purpose in the import declaration
• Be aware that ethanol content may trigger additional excise or customs checks, so declare it accurately
Related Products under Tariff item 2933.37.00
N-Phenethyl-4-piperidone (NPP) Pure Chemical
N-Phenethyl-4-piperidone (NPP) is a heterocyclic organic compound featuring an unfused piperidone ring (a hydrogenated pyridine derivative) with a phenethyl substituent at the nitrogen atom. This pure chemical form matches the tariff item's description exactly, as it is a separate chemically defined compound of Chapter 29. It is used as an intermediate in pharmaceutical synthesis, particularly for certain opioid analgesics.
N-Phenethyl-4-piperidone with Anti-Dusting Agent
N-Phenethyl-4-piperidone (NPP) powder treated with a silica anti-dusting agent at less than 0.5% by weight. The additive is permitted under Chapter 29 Note 1(g) as an anti-dusting agent for safety during handling and transport, and it does not alter the product's suitability for general chemical use. The core compound remains N-phenethyl-4-piperidone, classifiable under this tariff item.
NPP Custom Synthesis Intermediate
Custom-produced N-Phenethyl-4-piperidone (NPP) synthesized for specific pharmaceutical campaigns, with purity verified by HPLC. It is a separate chemically defined compound with an unfused piperidone ring, matching the tariff item's scope. The custom nature does not affect classification, as the chemical identity determines the heading.
NPP Laboratory Research Grade (>99%)
High-purity N-Phenethyl-4-piperidone (NPP) at greater than 99% purity, packaged for laboratory research. Classification is based on chemical identity, not end-use, so the research-grade designation does not affect the tariff item. It is a separate chemically defined heterocyclic compound with an unfused piperidone ring.
NPP Stabilized with Antioxidant
N-Phenethyl-4-piperidone (NPP) stabilized with butylated hydroxytoluene (BHT) to prevent oxidation during storage and transport. This additive is permitted under Chapter 29 Note 1(f) as a stabilizer necessary for preservation. The product retains its identity as a separate chemically defined compound, classifiable under this tariff item.