Product classification
HS code for Fenetylline: 2939.51
Alkaloids, theophylline and aminophylline (theophylline-ethylenediamine) and their derivatives, salts thereof, fenetylline (INN) and its salts.
Classification of fenetylline under HS 2939.51
Fenetylline is classified under HS code 2939.51. This classification is situated within Chapter 29, which encompasses organic chemicals, and specifically under heading 2939, which is reserved for alkaloids of vegetable origin (natural or reproduced by synthesis) and their derivatives. Fenetylline is a chemical compound that acts as a co-drug of amphetamine and theophylline. Its classification in 2939.51 is based on its chemical identity as a derivative of theophylline. The Harmonized System provides specific subheadings for certain psychotropic substances and alkaloids to facilitate international monitoring under various drug control conventions. As a pure chemical substance or a salt thereof, it must be classified in Chapter 29. The classification remains 2939.51 regardless of whether the substance is intended for research, forensic, or pharmaceutical use, provided it has not been formulated into a finished medicament. The 'INN' designation in the HS description refers to the International Nonproprietary Name, which is a unique name for pharmaceutical substances recognized globally to prevent confusion in prescription and trade.
- Covers
- Fenetylline (INN)
- Fenetylline hydrochloride
- Fenetylline salts
- Captagon (in bulk chemical form)
- Theophylline-ethylenediamine derivatives
- Synthetic fenetylline alkaloids
- Also under 2939.51
- Theophylline tablets (e.g., Theolair, Uniphyl)
- Aminophylline injections
- Fenetylline (Captagon - illicit drug)
Codes often confused with 2939.51
Common mistake. Fenetylline is often misclassified under HS code 3004.90 if it is in the form of tablets or finished dosage forms (medicaments). However, in its bulk chemical or powder form, it must remain in Chapter 29. It may also be confused with HS code 2933.33 or 2933.39, which cover other heterocyclic compounds with nitrogen, but 2939.51 is the specific and correct code for theophylline derivatives like fenetylline.
Top exporters and importers of HS 293951 (the code used for fenetylline), 2025
In 2025, the largest exporter of HS 293951 (the code used for fenetylline) in UN Comtrade data was Hungary, with 60% of world exports; the largest importer in UN Comtrade data was South Korea, with 53% of world imports. Austria reports $783M of its chapter 29 exports without product detail (confidential), so it may also belong among the top exporters.
Figures cover everything classified under HS 293951, not only fenetylline.
Top exporters 2025 · share of world exports
- 1 Hungary $384 60% of world exports
- 2 Belgium $260 40% of world exports
Austria reports $783M of its chapter 29 exports without product detail (confidential), so it may also belong among the top exporters.
World total: $644 Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 South Korea $213K 53% of world imports
- 2 Egypt $189K 47% of world imports
- 3 Brazil $361 <0.1% of world imports
World total: $403K 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 code for fenetylline
Brazil classifies fenetylline under NCM 2939.51.00: HS 2939.51 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about fenetylline
What is the HS code for Fenetylline?
The HS code for Fenetylline is 293951 (Alkaloids; theophylline and aminophylline (theophylline-ethylenediamine) and their derivatives; salts thereof, fenetylline (INN) and its salts). The specific HS code for Fenetylline and its salts is 2939.51.
How do I classify Fenetylline for customs?
Fenetylline is classified under HS code 293951 — Alkaloids; theophylline and aminophylline (theophylline-ethylenediamine) and their derivatives; salts thereof, fenetylline (INN) and its salts. This is a 6-digit subheading level code.
Is Fenetylline classified as a narcotic?
While it is a controlled substance, for customs purposes it is classified as an alkaloid derivative under 2939.51 rather than in the general narcotic headings.
Which countries are the top exporters of fenetylline (HS 293951)?
In 2025, the top exporters of HS 293951 (the code used for fenetylline) in UN Comtrade data were Hungary ($384, 60% of world exports) and Belgium ($260). World exports came to about $644, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Austria reports $783M of its chapter 29 exports without product detail (confidential), so it may also belong among the top exporters.
Which countries are the top importers of fenetylline (HS 293951)?
In 2025, the top importers of HS 293951 (the code used for fenetylline) in UN Comtrade data were South Korea ($213K, 53% of world imports), Egypt ($189K) and Brazil ($361). World imports came to about $403K, 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 Fenetylline the same in all countries?
The base HS code 293951 for Fenetylline 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 fenetylline in Brazil?
In Brazil, fenetylline (HS 293951) is classified under NCM 2939.51.00.