Product classification

HS code for Carfentanil: 2933.33

Heterocyclic compounds, containing an unfused pyridine ring (whether or not hydrogenated) in the structure, alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN), dipipanone (INN).

Classification of carfentanil under HS 2933.33

Carfentanil is classified under HS code 2933.33, which is situated within the category of heterocyclic compounds with nitrogen hetero-atom(s) only. Specifically, this subheading is dedicated to compounds containing an unfused pyridine ring in their chemical structure. Carfentanil is a highly potent synthetic opioid analog of fentanyl. The Harmonized System specifically names carfentanil under 2933.33 because it is an International Nonproprietary Name (INN) substance. Classification is strictly determined by the molecular structure—specifically the presence of the pyridine ring—and its identification as a specific pharmaceutical or chemical entity listed in the HS nomenclature. This ensures uniform global tracking and regulation of controlled substances. The classification follows the rules for organic chemicals in Chapter 29, where specific subheadings are provided for substances with high potential for abuse or those subject to international control conventions.

Covers
  • Carfentanil (INN) in pure chemical form
  • Carfentanil citrate
  • Salts of carfentanil
  • Esters of carfentanil
  • Chemical derivatives of carfentanil as defined in Chapter 29 notes
Also under 2933.33
  • Sufenta (Alfentanil)
  • Lexotan (Bromazepam)
  • Lomotil (Diphenoxylate, in combination)
  • specific research-grade controlled substances

Codes often confused with 2933.33

Common mistake. Carfentanil is often misclassified under HS code 2933.39, which is a residual category for "other" pyridine derivatives. However, because carfentanil is explicitly named in the 2933.33 subheading, the specific code must take precedence over the general one. It is also sometimes confused with HS code 3004 if it is prepared as a medicament for therapeutic or prophylactic use. However, in its bulk chemical form, it must remain in Chapter 29. Furthermore, it should not be confused with fentanyl itself, which is classified under 2933.33 but is a distinct chemical entity.

2933.39Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, n.e.c. in 2933.330.04Medicaments; (not goods of heading no. 3002, 3005 or 3006) consisting of mixed or unmixed products for therapeutic or prophylactic use, put up in measured doses (incl. those in the form of transdermal admin. systems) or packed for retail sale

Top exporters and importers of HS 293333 (the code used for carfentanil), 2025

In 2025, the largest exporter of HS 293333 (the code used for carfentanil) in UN Comtrade data was Switzerland, with 27% of world exports; the largest importer in UN Comtrade data was Spain, with 21% 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 293333, not only carfentanil.

Top exporters 2025 · share of world exports

  1. 1 Switzerland $29M
  2. 2 India $23M
  3. 3 United Kingdom $11M

World total: $107M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 Spain $22M
  2. 2 Germany $20M
  3. 3 Switzerland $10M

World total: $106M 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 carfentanil

Brazil splits HS 2933.33 into 32 NCM codes. Pick the one that matches your product:

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.

Questions about carfentanil

What is the HS code for Carfentanil?

The HS code for Carfentanil is 293333 (Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN), dipipanone (INN)). The HS code for Carfentanil (INN) is 2933.33, which covers specific heterocyclic compounds containing an unfused pyridine ring.

How do I classify Carfentanil for customs?

Carfentanil is classified under HS code 293333 — Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN), dipipanone (INN). This is a 6-digit subheading level code.

Why is Carfentanil listed specifically in the HS code?

Carfentanil is specifically listed under 2933.33 because it is an International Nonproprietary Name (INN) substance. The World Customs Organization (WCO) provides specific subheadings for such substances to facilitate the monitoring of trade in controlled and potent pharmaceutical chemicals.

Which countries are the top exporters of carfentanil (HS 293333)?

In 2025, the top exporters of HS 293333 (the code used for carfentanil) in UN Comtrade data were Switzerland ($29M, 27% of world exports), India ($23M) and the United Kingdom ($11M). World exports came to about $107M, 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 carfentanil (HS 293333)?

In 2025, the top importers of HS 293333 (the code used for carfentanil) in UN Comtrade data were Spain ($22M, 21% of world imports), Germany ($20M) and Switzerland ($10M). World imports came to about $106M, 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 Carfentanil the same in all countries?

The base HS code 293333 for Carfentanil 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 carfentanil in Brazil?

Brazil splits HS 293333 into 32 NCM codes, so the right one for carfentanil depends on the product's details: 2933.33.11 (Alfentanil), 2933.33.12 (Anileridine), 2933.33.19 (Salts of alfentanil and anileridine), 2933.33.21 (Bezitramide), 2933.33.22 (Bromazepam), 2933.33.29 (Salts of bezitramide and bromazepam), and more.