Product classification

HS code for Alfentanil: 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 alfentanil under HS 2933.33

Alfentanil is classified under Harmonized System (HS) code 2933.33. This classification is based on its chemical structure as a heterocyclic compound containing an unfused pyridine ring. The subheading 2933.33 specifically enumerates several pharmaceutical substances that share this structural characteristic, including alfentanil (INN), anileridine (INN), and others. The explicit mention of alfentanil by its International Nonproprietary Name (INN) within the HS description ensures its precise and unambiguous classification. This placement within Chapter 29 signifies that alfentanil is being classified as a distinct, pure organic chemical compound, rather than a pharmaceutical preparation.

Covers
  • Alfentanil (INN)
  • Anileridine (INN)
  • Bezitramide (INN)
  • Bromazepam (INN)
  • Carfentanil (INN)
  • Difenoxin (INN)
  • Diphenoxylate (INN)
  • Dipipanone (INN)
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. Alfentanil can be subject to misclassification, primarily with other nitrogen-heterocyclic compounds or pharmaceutical preparations. A common point of confusion might be with HS code 2933.39, which covers "Other" compounds containing an unfused pyridine ring in the structure, not specified elsewhere. The key differentiator for 2933.33 is the explicit listing of alfentanil and other specific INN substances. Another potential misclassification could be with pharmaceutical preparations of Chapter 30 (e.g., 3004). However, Chapter 29 is reserved for pure, unmixed chemical compounds, while Chapter 30 covers medicaments, which are typically formulated preparations containing active pharmaceutical ingredients. Therefore, pure alfentanil, as a chemical substance, remains in 2933.33, whereas a finished pharmaceutical product containing alfentanil would be classified in Chapter 30.

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 alfentanil), 2025

In 2025, the largest exporter of HS 293333 (the code used for alfentanil) 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 alfentanil.

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 alfentanil

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 alfentanil

What is the HS code for Alfentanil?

The HS code for Alfentanil 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 Alfentanil is 2933.33, which covers heterocyclic compounds containing an unfused pyridine ring in the structure, specifically listing alfentanil (INN) among others.

How do I classify Alfentanil for customs?

Alfentanil 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.

What does 'INN' signify in chemical classification?

INN stands for International Nonproprietary Name. It is a unique, globally recognized generic name assigned to pharmaceutical substances by the World Health Organization (WHO). Its inclusion in HS descriptions, such as for alfentanil, provides a standardized and unambiguous identification for active pharmaceutical ingredients, facilitating consistent classification and international trade.

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

In 2025, the top exporters of HS 293333 (the code used for alfentanil) 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 alfentanil (HS 293333)?

In 2025, the top importers of HS 293333 (the code used for alfentanil) 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 Alfentanil the same in all countries?

The base HS code 293333 for Alfentanil 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 alfentanil in Brazil?

Brazil splits HS 293333 into 32 NCM codes, so the right one for alfentanil 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.