HS code · 6-digit subheading
HS Code 2904.91 – Derivatives of hydrocarbons; trichloronitromethane (chloropicrin), whether or not halogenated
HS code 2904.91 is the 6-digit subheading for derivatives of hydrocarbons, trichloronitromethane (chloropicrin), whether or not halogenated. It is used for chloropicrin, trichloronitromethane, PS (warning agent), larvacide and pic-Clor.
What HS 2904.91 covers
This HS code specifically covers trichloronitromethane, commonly known as chloropicrin. This chemical is a potent broad-spectrum antimicrobial agent, primarily used as a soil fumigant in agriculture to control a wide range of pests, including fungi, nematodes, and insects, before planting crops. It is also used as a warning agent in other fumigants due to its strong lachrymatory (tear-inducing) properties. International trade involves its movement from chemical manufacturers to agricultural regions requiring soil sterilization. Key considerations include its high toxicity, strict regulatory controls for handling and application, and the need for specialized equipment and training for its use. Its demand is linked to intensive agricultural practices and pest management strategies.
- Covers
- Chloropicrin
- Trichloronitromethane
- PS (warning agent)
- Larvacide
- Pic-Clor
- Examples
- Telone C-35 (Dow AgroSciences)
- Tri-Clor (AMVAC)
- Chloropicrin 100 (Terraclor)
Codes often confused with 2904.91
Common mistake. This code is specific to chloropicrin. It should not be confused with other nitrated derivatives of hydrocarbons (2904.99) or other halogenated derivatives (2903.X), as its unique chemical structure and lachrymatory properties set it apart.
Top exporters and importers of HS code 290491, 2025
In 2025, the largest exporter of HS code 290491 in UN Comtrade data was the United States, with 59% of world exports; the largest importer in UN Comtrade data was Spain, with 32% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 United States $13M 59% of world exports
- 2 China $7.5M 34% of world exports
- 3 Chile $674K 3.0% of world exports
World total: $22M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Spain $7.2M 32% of world imports
- 2 Chile $3.1M 14% of world imports
- 3 Australia $2.9M 13% of world imports
World total: $22M 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 2904.91
Brazil does not split HS 2904.91: its NCM code is 2904.91.00.
All Brazil NCM codes in heading 29.04 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2904.91
What is HS code 290491?
HS code 290491 is a 6-digit subheading in the Harmonized System that covers: Derivatives of hydrocarbons; trichloronitromethane (chloropicrin), whether or not halogenated. This HS code specifically covers trichloronitromethane, commonly known as chloropicrin. This chemical is a potent broad-spectrum antimicrobial agent, primarily used as a soil fumigant in agriculture to control a wide range of pests, including fungi, nematodes, and insects, before planting crops. It is also used as a warning agent in other fumigants due to its strong lachrymatory (tear-inducing) properties. International trade involves its movement from chemical manufacturers to agricultural regions requiring soil sterilization. Key considerations include its high toxicity, strict regulatory controls for handling and application, and the need for specialized equipment and training for its use. Its demand is linked to intensive agricultural practices and pest management strategies.
What products fall under HS code 290491?
Chloropicrin, Trichloronitromethane, PS (warning agent), Larvacide, Pic-Clor
What are common misclassifications for HS code 290491?
This code is specific to chloropicrin. It should not be confused with other nitrated derivatives of hydrocarbons (2904.99) or other halogenated derivatives (2903.X), as its unique chemical structure and lachrymatory properties set it apart.
Which countries are the top exporters of goods under HS code 290491?
In 2025, the top exporters of HS code 290491 in UN Comtrade data were the United States ($13M, 59% of world exports), China ($7.5M) and Chile ($674K). World exports came to about $22M, 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 goods under HS code 290491?
In 2025, the top importers of HS code 290491 in UN Comtrade data were Spain ($7.2M, 32% of world imports), Chile ($3.1M) and Australia ($2.9M). World imports came to about $22M, 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.
How is HS code 290491 structured?
HS code 290491 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (04) identify the heading, and digits 5-6 (91) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 290491?
In Brazil, HS code 290491 is NCM 2904.91.00. The last two digits are 00 because Brazil does not split this HS code further.