Product classification
HS code for Piperidine: 2933.32
Heterocyclic compounds, containing an unfused pyridine ring (whether or not hydrogenated) in the structure, piperidine and its salts.
Classification of piperidine under HS 2933.32
Piperidine is a heterocyclic organic compound with the molecular formula (CH2)5NH, characterized by a six-membered ring containing five carbon atoms and one nitrogen atom. Under the Harmonized System, it is classified within Chapter 29, which encompasses organic chemicals. Specifically, heading 2933 covers heterocyclic compounds with nitrogen hetero-atom(s) only. Within this heading, subheading 2933.32 is dedicated exclusively to piperidine and its salts. This classification is determined by the chemical structure of the molecule; because it is a saturated heterocyclic compound, it falls under the category of an unfused pyridine ring, even though it is fully hydrogenated. The salts of piperidine, such as piperidine hydrochloride, are also included here because the General Rules for the Interpretation of the Harmonized System (GRI) dictate that salts of organic bases are classified with the base itself in Chapter 29. Furthermore, Note 3 to Chapter 29 specifies that goods which could be included in two or more of the headings of this chapter are to be classified in that one of those headings which occurs last in numerical order. However, since piperidine is explicitly named in 2933.32, this specific subheading takes precedence over more general ones. The compound is a secondary amine and is often used as a solvent and a building block in the synthesis of pharmaceuticals and rubber chemicals. Due to its potential use in the illicit manufacture of controlled substances, it is monitored internationally, which is why it has a specific six-digit HS code to facilitate global tracking and regulatory compliance.
- Covers
- Pure piperidine (hexahydropyridine)
- Piperidine hydrochloride
- Piperidine acetate
- Piperidine aurichloride
- Other chemical salts of piperidine
- Also under 2933.32
- Piperidine from Sigma-Aldrich
- industrial-grade piperidine from chemical suppliers
- specific research-grade piperidine derivatives
Codes often confused with 2933.32
Common mistake. Piperidine is commonly confused with Pyridine, which is classified under HS code 2933.31. While they share a similar ring structure, pyridine is unsaturated. Another common error is classifying piperidine derivatives under 2933.39; however, the base compound and its salts must remain in 2933.32. Additionally, some importers mistakenly look at heading 2921 for amine-function compounds, but because the nitrogen is part of a heterocyclic ring, heading 2933 is the legally correct choice.
Top exporters and importers of HS 293332 (the code used for piperidine), 2025
In 2025, the largest exporter of HS 293332 (the code used for piperidine) in UN Comtrade data was India, with 57% of world exports; the largest importer in UN Comtrade data was Brazil, with 15% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 293332, not only piperidine.
Top exporters 2025 · share of world exports
- 1 India $29M 57% of world exports
- 2 United Kingdom $5.0M 10% of world exports
- 3 Germany $3.8M 7.7% of world exports
World total: $50M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Brazil $6.6M 15% of world imports
- 2 India $6.3M 15% of world imports
- 3 Switzerland $5.5M 13% of world imports
World total: $43M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for piperidine
Brazil classifies piperidine under NCM 2933.32.00: HS 2933.32 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about piperidine
What is the HS code for Piperidine?
The HS code for Piperidine is 293332 (Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, piperidine and its salts). The specific HS code for piperidine and its salts is 2933.32.
How do I classify Piperidine for customs?
Piperidine is classified under HS code 293332 — Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, piperidine and its salts. This is a 6-digit subheading level code.
Are piperidine salts classified differently than the base?
No, according to the legal notes of Chapter 29, salts of heterocyclic compounds are classified in the same subheading as the compound itself.
Which countries are the top exporters of piperidine (HS 293332)?
In 2025, the top exporters of HS 293332 (the code used for piperidine) in UN Comtrade data were India ($29M, 57% of world exports), the United Kingdom ($5.0M) and Germany ($3.8M). World exports came to about $50M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of piperidine (HS 293332)?
In 2025, the top importers of HS 293332 (the code used for piperidine) in UN Comtrade data were Brazil ($6.6M, 15% of world imports), India ($6.3M) and Switzerland ($5.5M). World imports came to about $43M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Piperidine the same in all countries?
The base HS code 293332 for Piperidine is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for piperidine in Brazil?
In Brazil, piperidine (HS 293332) is classified under NCM 2933.32.00.