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.
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 anti-dusting agent exceeds permissible limits or changes the product's character
Excessive additives may push classification to a residual pyridine derivative item.
If the additive content is high enough to make the product a preparation rather than a chemical compound
Preparations not elsewhere specified fall under heading 3824.
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
• Document the anti-dusting agent concentration (must be below 0.5%) and its purpose to justify classification under Chapter 29
• Include the additive's safety data sheet in your import documentation
• Confirm with CBSA that the additive does not render the product suitable for a specific use, which could change classification
Related Products under Tariff item 2933.37.00
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.
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.
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.