Product classification
HS code for Methyprylon: 2933.72
Heterocyclic compounds, lactams, clobazam (INN) and methyprylon (INN).
Classification of methyprylon under HS 2933.72
Methyprylon is classified under HS code 2933.72. This code is part of Chapter 29, which covers organic chemicals, and heading 2933, which is dedicated to heterocyclic compounds with nitrogen hetero-atom(s) only. Specifically, Methyprylon falls under the sub-category of lactams. A lactam is a cyclic amide, and Methyprylon (a piperidinedione derivative) fits this structural definition. Methyprylon is a sedative-hypnotic medication, and its classification is specifically named in the Harmonized System nomenclature alongside Clobazam under sub-heading 2933.72. This specific naming ensures that the substance is tracked accurately for both trade and regulatory purposes, given its nature as a pharmaceutical agent.
- Covers
- Methyprylon (INN)
- Methyprylon bulk substance
- Salts of Methyprylon
- Methyprylon in non-dosage forms
- Also under 2933.72
- Onfi (Clobazam)
- Frisium (Clobazam)
- Noludar (Methyprylon - historical)
Codes often confused with 2933.72
Common mistake. The most frequent misclassification for Methyprylon is HS code 3004.90. This occurs when the product is imported in the form of finished dosage units (like tablets or capsules) for retail sale. If it is in dosage form, Chapter 30 (Medicaments) takes precedence. However, as a bulk raw chemical, it must be classified in 2933.72. It is also sometimes confused with 2933.71 (6-Hexanelactam/Caprolactam), but 2933.72 is the specific international designation for Methyprylon. Importers must also distinguish it from other heterocyclic compounds in 2933.99.
Top exporters and importers of HS 293372 (the code used for methyprylon), 2025
In 2025, the largest exporter of HS 293372 (the code used for methyprylon) in UN Comtrade data was France, with 52% of world exports; the largest importer in UN Comtrade data was Brazil, with 26% 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 293372, not only methyprylon.
Top exporters 2025 · share of world exports
- 1 France $10M 52% of world exports
- 2 Germany $6.9M 35% of world exports
- 3 India $2.3M 12% of world exports
World total: $20M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Brazil $3.8M 26% of world imports
- 2 India $3.4M 23% of world imports
- 3 Canada $1.5M 10% of world imports
World total: $15M 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 codes for methyprylon
Brazil splits HS 2933.72 into 2 NCM codes. Pick the one that matches your product:
- 2933.72.10Clobazam
- 2933.72.20Methyprylon
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about methyprylon
What is the HS code for Methyprylon?
The HS code for Methyprylon is 293372 (Heterocyclic compounds; lactams; clobazam (INN) and methyprylon (INN)). The HS code for Methyprylon as a pure chemical substance is 2933.72.
How do I classify Methyprylon for customs?
Methyprylon is classified under HS code 293372 — Heterocyclic compounds; lactams; clobazam (INN) and methyprylon (INN). This is a 6-digit subheading level code.
Does the HS code change if Methyprylon is in tablet form?
Yes, if Methyprylon is prepared in measured doses or packaged for retail sale as a medicine, it is classified under heading 3004 instead of 2933.
Which countries are the top exporters of methyprylon (HS 293372)?
In 2025, the top exporters of HS 293372 (the code used for methyprylon) in UN Comtrade data were France ($10M, 52% of world exports), Germany ($6.9M) and India ($2.3M). World exports came to about $20M, 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 methyprylon (HS 293372)?
In 2025, the top importers of HS 293372 (the code used for methyprylon) in UN Comtrade data were Brazil ($3.8M, 26% of world imports), India ($3.4M) and Canada ($1.5M). World imports came to about $15M, 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 Methyprylon the same in all countries?
The base HS code 293372 for Methyprylon 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 methyprylon in Brazil?
Brazil splits HS 293372 into 2 NCM codes, so the right one for methyprylon depends on the product's details: 2933.72.10 (Clobazam), 2933.72.20 (Methyprylon).