Product classification
HS code for Mirex: 2903.83
Halogenated derivatives of cyclanic, cyclenic or cycloterpenic hydrocarbons, mirex (ISO).
Classification of mirex under HS 2903.83
Mirex is classified under HS code 2903.83, which specifically identifies this substance as a halogenated derivative of cyclanic, cyclenic, or cycloterpenic hydrocarbons. Chapter 29 of the Harmonized System covers organic chemicals, and heading 2903 is dedicated to halogenated derivatives of hydrocarbons. Mirex, chemically known as dodecachlorooctahydro-1,3,4-metheno-2H-cyclobuta[cd]pentalene, is an organochlorine that was historically used as an insecticide and fire retardant. Because it is a specific, named compound in the international nomenclature (ISO), it is assigned its own unique subheading to facilitate monitoring under international environmental agreements like the Stockholm Convention. The classification depends on the chemical purity and the specific molecular structure that defines it as a cyclanic hydrocarbon derivative. As a halogenated derivative, the presence of chlorine atoms replacing hydrogen atoms in the hydrocarbon structure is the defining chemical characteristic for its placement within this specific branch of Chapter 29.
- Covers
- Technical grade Mirex
- Mirex (ISO) standard reference material
- Dodecachlorooctahydro-1,3,4-metheno-2H-cyclobuta[cd]pentalene
- Dechlorane (commercial name for Mirex)
- Analytical standards of Mirex
- Also under 2903.83
- Mirex bait (historical fire ant control)
- Dechlorane (related, but Mirex is specific)
Codes often confused with 2903.83
Common mistake. Mirex is often confused with other organochlorine pesticides. It may be misclassified under 2903.81, which is reserved for Lindane (ISO, INN), or 2903.82, which covers Aldrin, Chlordane, and Heptachlor. These substances are all halogenated derivatives of cyclanic hydrocarbons, but the HS system provides specific subheadings for each due to their status as persistent organic pollutants. Another common error is classifying Mirex under 3808.91 (insecticides) if it is prepared as a finished product. However, as a separate chemically defined compound, it must remain in Chapter 29 regardless of its intended use.
Top exporters and importers of HS 290383 (the code used for mirex), 2025
In 2025, the largest exporter of HS 290383 (the code used for mirex) in UN Comtrade data was France, with 85% of world exports; the largest importer in UN Comtrade data was Germany, with 52% of world imports. Mexico reports $578M of its heading 2903 imports without product detail (confidential), so it may also belong among the top importers.
Figures cover everything classified under HS 290383, not only mirex.
Top exporters 2025 · share of world exports
- 1 France $111K 85% of world exports
- 2 India $8K 6.1% of world exports
- 3 Germany $7K 5.7% of world exports
World total: $131K Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Germany $74K 52% of world imports
- 2 Denmark $67K 47% of world imports
- 3 Côte d'Ivoire $332 0.2% of world imports
Mexico reports $578M of its heading 2903 imports without product detail (confidential), so it may also belong among the top importers.
World total: $144K 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 mirex
Brazil classifies mirex under NCM 2903.83.00: HS 2903.83 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about mirex
What is the HS code for Mirex?
The HS code for Mirex is 290383 (Halogenated derivatives of cyclanic, cyclenic or cycloterpenic hydrocarbons; mirex (ISO)). The HS code for Mirex is 2903.83, specifically for halogenated derivatives of cyclanic, cyclenic, or cycloterpenic hydrocarbons.
How do I classify Mirex for customs?
Mirex is classified under HS code 290383 — Halogenated derivatives of cyclanic, cyclenic or cycloterpenic hydrocarbons; mirex (ISO). This is a 6-digit subheading level code.
Is Mirex classified differently if used as a flame retardant?
Regardless of its application as a flame retardant or insecticide, if it is the pure chemical compound, it remains under 2903.83. Only if it is part of a prepared mixture or formulated product would the classification potentially move to Chapter 38.
Which countries are the top exporters of mirex (HS 290383)?
In 2025, the top exporters of HS 290383 (the code used for mirex) in UN Comtrade data were France ($111K, 85% of world exports), India ($8K) and Germany ($7K). World exports came to about $131K, 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 mirex (HS 290383)?
In 2025, the top importers of HS 290383 (the code used for mirex) in UN Comtrade data were Germany ($74K, 52% of world imports), Denmark ($67K) and Côte d'Ivoire ($332). World imports came to about $144K, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Mexico reports $578M of its heading 2903 imports without product detail (confidential), so it may also belong among the top importers.
Is the HS code for Mirex the same in all countries?
The base HS code 290383 for Mirex 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 mirex in Brazil?
In Brazil, mirex (HS 290383) is classified under NCM 2903.83.00.