HS Code for NPP

N-phenethyl-4-piperidone, commonly known as NPP, is classified under HS code 2933.37. This classification is found within Chapter 29, which covers organic chemicals. Heading 2933 is dedicated to heterocyclic compounds with nitrogen hetero-atom(s) only. Specifically, subheading 2933.37 is an explicit entry for N-phenethyl-4-piperidone. This chemical is a precursor used in the synthesis of various pharmaceuticals, most notably fentanyl and its analogues. Because of its role as a precursor, it is subject to international monitoring and strict trade controls under the 1988 UN Convention against Illicit Traffic in Narcotic Drugs and Psychotropic Substances. The classification is based on the molecular structure of the compound, which features an unfused pyridine ring (specifically a piperidine ring, which is a hydrogenated pyridine ring). According to the General Rules of Interpretation (GRI 1), the specific naming of the compound in the HS nomenclature takes precedence over more general categories. Accurate classification of NPP is critical for regulatory compliance, as misclassification can lead to severe legal penalties regarding the transport of controlled precursor chemicals. Customs authorities often require specific permits and end-use certificates for items under this code.

Products Included

• N-phenethyl-4-piperidone (NPP)
• NPP chemical intermediate (pure form)
• NPP salts (classified under the same code per Chapter 29 Note 5)

Common Misclassification

NPP is often misclassified under 2933.33, which covers Fentanyl and its derivatives, or 2933.39, which is the residual category for other pyridine derivatives. It may also be confused with 4-Piperidone (2933.39) or ANPP (4-anilino-N-phenethylpiperidine), which has its own specific code 2933.36.

FAQ

What is the HS code for NPP?

The specific HS code for N-phenethyl-4-piperidone (NPP) is 2933.37.

Is NPP a controlled substance in international trade?

Yes, NPP is a List I precursor chemical and requires strict documentation and often an import/export permit due to its use in synthetic drug manufacturing.