HS code · 6-digit subheading

HS Code 2933.91 – Heterocyclic compounds; alprazolam (INN), camazepam (INN), chlordiazepoxide (INN), clonazepam (INN), clorazepate, delorazepam (INN), diazepam (INN), estazolam (INN), ethyl loflazepate (INN), fludiazepam (INN), flunitrazepam (INN), (cont)

HS code 2933.91 is the 6-digit subheading for heterocyclic compounds, alprazolam (INN), camazepam (INN), chlordiazepoxide (INN), clonazepam (INN), clorazepate, delorazepam (INN), diazepam (INN), estazolam (INN), ethyl loflazepate (INN), fludiazepam (INN), flunitrazepam (INN), (cont). It is used for alprazolam, diazepam, clonazepam, flunitrazepam and chlordiazepoxide.

What HS 2933.91 covers

This highly specific HS code covers a range of benzodiazepine compounds, identified by their International Nonproprietary Names (INN), such as alprazolam, diazepam, and clonazepam. These are potent psychoactive substances primarily used as active pharmaceutical ingredients (APIs) in medications for anxiety, insomnia, seizures, and muscle spasms. Due to their therapeutic effects and potential for abuse, international trade is under strict control, governed by conventions like the UN Convention on Psychotropic Substances. Only licensed pharmaceutical manufacturers and distributors are typically involved in their import and export, with rigorous documentation and security measures required. Purity, pharmaceutical grade, and compliance with national drug control agencies are paramount.

Covers
  • Alprazolam
  • Diazepam
  • Clonazepam
  • Flunitrazepam
  • Chlordiazepoxide
  • Estazolam
  • Lorazepam
Examples
  • Xanax (Alprazolam)
  • Valium (Diazepam)
  • Klonopin (Clonazepam)
  • Rohypnol (Flunitrazepam)

Codes often confused with 2933.91

Common mistake. Misclassification is rare due to the explicit listing of INNs, but could theoretically be confused with other controlled substances in 2939 (alkaloids) or other heterocyclic compounds in 2933.99 if not precisely identified.

29.39Alkaloids; natural or reproduced by synthesis, and their salts, ethers, esters and other derivatives2933.99Heterocyclic compounds; n.e.c. in headings no. 2933

Top exporters and importers of HS code 293391, 2025

In 2025, the largest exporter of HS code 293391 in UN Comtrade data was Italy, with 31% of world exports; the largest importer in UN Comtrade data was Italy, with 18% 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. 1 Italy $51M
  2. 2 United States $47M
  3. 3 India $19M

World total: $164M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 Italy $29M
  2. 2 Germany $21M
  3. 3 Belgium $15M

World total: $158M 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 2933.91 36

Brazil splits HS 2933.91 into 36 NCM codes, Mercosur's 8-digit tariff lines.

  1. 2933.91.1 Alprazolam, camazepam, clonazepam, clorazepate and chlordiazepoxide; salts thereofAlprazolam, camazepam, clonazepam, clorazepato e clorodiazepóxido; sais destes produtos Group
  2. 2933.91.11 AlprazolamAlprazolam
  3. 2933.91.12 CamazepamCamazepam
  4. 2933.91.13 ClonazepamClonazepam
  5. 2933.91.14 ClorazepateClorazepato
  6. 2933.91.15 ChlordiazepoxideClordiazepóxido
  7. 2933.91.19 Salts of alprazolam, camazepam, clonazepam etcOutros
  8. 2933.91.2 Delorazepam, diazepam and estazolam; salts thereofDelorazepam, diazepam e estazolam; sais destes produtos Group
  9. 2933.91.21 DelorazepamDelorazepam
  10. 2933.91.22 DiazepamDiazepam
  11. 2933.91.23 EstazolamEstazolam
  12. 2933.91.29 Salts of delorazepam, diazepam and estazolamOutros
  13. 2933.91.3 Fludiazepam, flunitrazepam, flurazepam and halazepam; salts thereofFludiazepam, flunitrazepam, flurazepam e halazepam; sais destes produtos Group
  14. 2933.91.31 FludiazepamFludiazepam
  15. 2933.91.32 FlunitrazepamFlunitrazepam
  16. 2933.91.33 FlurazepamFlurazepam
  17. 2933.91.34 HalazepamHalazepam
  18. 2933.91.39 Salts of fludiazepam, flunitrazepam etcOutros
  19. 2933.91.4 Ethyl loflazepate, lorazepam and lormetazepam; salts thereofLoflazepato de etila, lorazepam e lormetazepam; sais destes produtos Group
  20. 2933.91.41 Ethyl loflazepateLoflazepato de etila
  21. 2933.91.42 LorazepamLorazepam
  22. 2933.91.43 LormetazepamLormetazepam
  23. 2933.91.49 Ethyl loflazepate, lorazepam, lormetazepam saltsOutros
  24. 2933.91.5 Mazindol, medazepam and midazolam; salts thereofMazindol, medazepam e midazolam; sais destes produtos Group
  25. 2933.91.51 MazindolMazindol
  26. 2933.91.52 MedazepamMedazepam
  27. 2933.91.53 Midazolam and its saltsMidazolam e seus sais
  28. 2933.91.59 Salts of mazindol and medazepamOutros
  29. 2933.91.6 Nimetazepam, nitrazepam, nordazepam and oxazepam; salts thereofNimetazepam, nitrazepam, nordazepam e oxazepam; sais destes produtos Group
  30. 2933.91.61 NimetazepamNimetazepam
  31. 2933.91.62 NitrazepamNitrazepam
  32. 2933.91.63 NordazepamNordazepam
  33. 2933.91.64 OxazepamOxazepam
  34. 2933.91.69 Nimetazepam/nitrazepam/nordazepam/oxazepam saltsOutros
  35. 2933.91.7 Pinazepam, pyrovalerone and prazepam; salts thereofPinazepam, pirovalerona e prazepam; sais destes produtos Group
  36. 2933.91.71 PinazepamPinazepam
  37. 2933.91.72 PyrovaleronePirovalerona
  38. 2933.91.73 PrazepamPrazepam
  39. 2933.91.79 Salts of pinazepam, pyrovalerone and prazepamOutros
  40. 2933.91.8 Temazepam, tetrazepam and triazolam; salts thereofTemazepam, tetrazepam e triazolam; sais destes produtos Group
  41. 2933.91.81 TemazepamTemazepam
  42. 2933.91.82 TetrazepamTetrazepam
  43. 2933.91.83 TriazolamTriazolam
  44. 2933.91.89 Salts of temazepam, tetrazepam and triazolamOutros

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 2933.91

What is HS code 293391?

HS code 293391 is a 6-digit subheading in the Harmonized System that covers: Heterocyclic compounds; alprazolam (INN), camazepam (INN), chlordiazepoxide (INN), clonazepam (INN), clorazepate, delorazepam (INN), diazepam (INN), estazolam (INN), ethyl loflazepate (INN), fludiazepam (INN), flunitrazepam (INN), (cont). This highly specific HS code covers a range of benzodiazepine compounds, identified by their International Nonproprietary Names (INN), such as alprazolam, diazepam, and clonazepam. These are potent psychoactive substances primarily used as active pharmaceutical ingredients (APIs) in medications for anxiety, insomnia, seizures, and muscle spasms. Due to their therapeutic effects and potential for abuse, international trade is under strict control, governed by conventions like the UN Convention on Psychotropic Substances. Only licensed pharmaceutical manufacturers and distributors are typically involved in their import and export, with rigorous documentation and security measures required. Purity, pharmaceutical grade, and compliance with national drug control agencies are paramount.

What products fall under HS code 293391?

Alprazolam, Diazepam, Clonazepam, Flunitrazepam, Chlordiazepoxide, Estazolam, Lorazepam

What are common misclassifications for HS code 293391?

Misclassification is rare due to the explicit listing of INNs, but could theoretically be confused with other controlled substances in 2939 (alkaloids) or other heterocyclic compounds in 2933.99 if not precisely identified.

Which countries are the top exporters of goods under HS code 293391?

In 2025, the top exporters of HS code 293391 in UN Comtrade data were Italy ($51M, 31% of world exports), the United States ($47M) and India ($19M). World exports came to about $164M, 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 293391?

In 2025, the top importers of HS code 293391 in UN Comtrade data were Italy ($29M, 18% of world imports), Germany ($21M) and Belgium ($15M). World imports came to about $158M, 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 293391 structured?

HS code 293391 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 (91) specify the subheading. This code is standardized globally by the World Customs Organization.

What is the Brazil NCM code for HS code 293391?

Brazil splits HS code 293391 into 36 NCM codes: 2933.91.11 (Alprazolam), 2933.91.12 (Camazepam), 2933.91.13 (Clonazepam), 2933.91.14 (Clorazepate), 2933.91.15 (Chlordiazepoxide), 2933.91.19 (Salts of alprazolam, camazepam, clonazepam etc), 2933.91.21 (Delorazepam), 2933.91.22 (Diazepam), and more listed on this page. The first 6 digits of each match the HS code.