Product classification
HS code for Ethchlorvynol: 2905.51
Alcohols, acyclic, halogenated, sulphonated, nitrated or nitrosated derivatives thereof, ethchlorvynol (INN).
Classification of ethchlorvynol under HS 2905.51
Ethchlorvynol is classified under HS code 2905.51 because it is a halogenated derivative of an acyclic alcohol. According to the General Rules for the Interpretation (GRI) of the Harmonized System, specifically GRI 1, classification is determined by the terms of the headings and any relative section or chapter notes. Chapter 29 covers organic chemicals, and heading 2905 specifically addresses acyclic alcohols and their halogenated, sulphonated, nitrated, or nitrosated derivatives. Ethchlorvynol is a tertiary acetylenic alcohol that contains a chlorine atom, placing it firmly within the scope of halogenated derivatives. Subheading 2905.51 is a specific international provision for Ethchlorvynol (INN), ensuring uniform classification across all member nations of the World Customs Organization. This classification applies to the pure chemical substance, even if it contains impurities or is dissolved in water or other solvents for safety or transport, provided it does not meet the criteria for a prepared medicament.
- Covers
- Ethchlorvynol (INN)
- Placidyl (brand name chemical form)
- 1-chloro-3-ethylpent-1-en-4-yn-3-ol
- Halogenated acyclic tertiary alcohols
- Also under 2905.51
- Placidyl (historical brand name for ethchlorvynol)
- specific API suppliers for controlled substances
- research chemical distributors
Codes often confused with 2905.51
Common mistake. Ethchlorvynol is frequently misclassified under HS code 2905.59, which is the residual category for other halogenated derivatives of acyclic alcohols. However, because 2905.51 is a specific named entry for Ethchlorvynol, it must take precedence. Another common error is attempting to classify it under HS code 3004 as a medicament. While Ethchlorvynol is used as a sedative and hypnotic, it is only classified in Chapter 30 if it has been mixed for therapeutic use or put up in measured doses or retail packings for medical purposes.
Top exporters and importers of HS 290551 (the code used for ethchlorvynol), 2025
In 2025, the largest exporter of HS 290551 (the code used for ethchlorvynol) in UN Comtrade data was the United States, with 92% of world exports; the largest importer in UN Comtrade data was Syria, with about 82% 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 290551, not only ethchlorvynol.
Top exporters 2025 · share of world exports
- 1 United States $188K 92% of world exports
- 2 Saudi Arabia $12K 6.0% of world exports
- 3 United Kingdom $2K 1.0% of world exports
World total: $204K Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Syria* ~$12K 82% of world imports · partner records ↗
- 2 Egypt $1K 6.8% of world imports
- 3 Montenegro $703 4.7% of world imports
World total: $15K 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 marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. 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 ethchlorvynol
Brazil classifies ethchlorvynol under NCM 2905.51.00: HS 2905.51 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
EU Regulatory Requirements
This product category is subject to the EU Deforestation Regulation (EUDR). Importers must provide due diligence statements proving the product was not produced on deforested land after December 31, 2020.
Questions about ethchlorvynol
What is the HS code for Ethchlorvynol?
The HS code for Ethchlorvynol is 290551 (Alcohols; acyclic; halogenated, sulphonated, nitrated or nitrosated derivatives thereof, ethchlorvynol (INN)). The international HS code for Ethchlorvynol is 2905.51.
How do I classify Ethchlorvynol for customs?
Ethchlorvynol is classified under HS code 290551 — Alcohols; acyclic; halogenated, sulphonated, nitrated or nitrosated derivatives thereof, ethchlorvynol (INN). This is a 6-digit subheading level code.
Is Ethchlorvynol subject to international controls?
Yes, as a psychotropic substance, its trade is often monitored under the 1971 Convention on Psychotropic Substances, which may require additional import/export permits despite its 2905.51 classification.
Which countries are the top exporters of ethchlorvynol (HS 290551)?
In 2025, the top exporters of HS 290551 (the code used for ethchlorvynol) in UN Comtrade data were the United States ($188K, 92% of world exports), Saudi Arabia ($12K) and the United Kingdom ($2K). World exports came to about $204K, 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 ethchlorvynol (HS 290551)?
In 2025, the top importers of HS 290551 (the code used for ethchlorvynol) in UN Comtrade data were Syria (about $12K, 82% of world imports), Egypt ($1K) and Montenegro ($703). World imports came to about $15K, 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 Ethchlorvynol the same in all countries?
The base HS code 290551 for Ethchlorvynol 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 ethchlorvynol in Brazil?
In Brazil, ethchlorvynol (HS 290551) is classified under NCM 2905.51.00.