HS code · 6-digit subheading
HS Code 2933.72 – Heterocyclic compounds; lactams; clobazam (INN) and methyprylon (INN)
HS code 2933.72 is the 6-digit subheading for heterocyclic compounds, lactams, clobazam (INN) and methyprylon (INN). It is used for clobazam, methyprylon, clobazam API, methyprylon API and clobazam powder.
What HS 2933.72 covers
This HS code specifically covers two distinct lactam compounds: clobazam (INN) and methyprylon (INN). Both are active pharmaceutical ingredients (APIs) with significant medical applications, though their usage profiles differ. Clobazam is a benzodiazepine derivative used as an anxiolytic and anticonvulsant, particularly in the treatment of epilepsy. Methyprylon, historically used as a sedative-hypnotic, has largely been superseded by newer drugs but may still be traded for specific markets or research. Due to their pharmacological activity, especially clobazam's status as a controlled substance in many jurisdictions, international trade is subject to stringent regulatory oversight, including licensing, quotas, and reporting requirements under international conventions like the UN Convention on Psychotropic Substances. Key players in this trade are specialized pharmaceutical manufacturers and distributors, often located in countries with advanced pharmaceutical synthesis capabilities like India, China, and European nations. Importers are typically pharmaceutical companies for formulation into finished dosage forms or research institutions. Compliance with national drug control laws and international treaties is paramount for any entity involved in the cross-border movement of these sensitive compounds.
- Covers
- Clobazam
- Methyprylon
- Clobazam API
- Methyprylon API
- Clobazam powder
- Methyprylon raw material
- Examples
- Onfi (Clobazam)
- Frisium (Clobazam)
- Noludar (Methyprylon - historical)
Codes often confused with 2933.72
Common mistake. This code is precise for clobazam and methyprylon. It should not be confused with 293371 (epsilon-caprolactam) or 293379 (other lactams), as these specific APIs have unique regulatory and trade implications.
Top exporters and importers of HS code 293372, 2025
In 2025, the largest exporter of HS code 293372 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.
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 2933.72 2
Brazil splits HS 2933.72 into 2 NCM codes, Mercosur's 8-digit tariff lines.
All Brazil NCM codes in heading 29.33 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2933.72
What is HS code 293372?
HS code 293372 is a 6-digit subheading in the Harmonized System that covers: Heterocyclic compounds; lactams; clobazam (INN) and methyprylon (INN). This HS code specifically covers two distinct lactam compounds: clobazam (INN) and methyprylon (INN). Both are active pharmaceutical ingredients (APIs) with significant medical applications, though their usage profiles differ. Clobazam is a benzodiazepine derivative used as an anxiolytic and anticonvulsant, particularly in the treatment of epilepsy. Methyprylon, historically used as a sedative-hypnotic, has largely been superseded by newer drugs but may still be traded for specific markets or research. Due to their pharmacological activity, especially clobazam's status as a controlled substance in many jurisdictions, international trade is subject to stringent regulatory oversight, including licensing, quotas, and reporting requirements under international conventions like the UN Convention on Psychotropic Substances. Key players in this trade are specialized pharmaceutical manufacturers and distributors, often located in countries with advanced pharmaceutical synthesis capabilities like India, China, and European nations. Importers are typically pharmaceutical companies for formulation into finished dosage forms or research institutions. Compliance with national drug control laws and international treaties is paramount for any entity involved in the cross-border movement of these sensitive compounds.
What products fall under HS code 293372?
Clobazam, Methyprylon, Clobazam API, Methyprylon API, Clobazam powder, Methyprylon raw material
What are common misclassifications for HS code 293372?
This code is precise for clobazam and methyprylon. It should not be confused with 293371 (epsilon-caprolactam) or 293379 (other lactams), as these specific APIs have unique regulatory and trade implications.
Which countries are the top exporters of goods under HS code 293372?
In 2025, the top exporters of HS code 293372 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 goods under HS code 293372?
In 2025, the top importers of HS code 293372 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.
How is HS code 293372 structured?
HS code 293372 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (33) identify the heading, and digits 5-6 (72) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 293372?
Brazil splits HS code 293372 into 2 NCM codes: 2933.72.10 (Clobazam), 2933.72.20 (Methyprylon). The first 6 digits of each match the HS code.