Product classification
HS code for Trichlorfon: 2931.54
Halogenated organo-phosphorous derivatives, trichlorfon (ISO).
Classification of trichlorfon under HS 2931.54
Trichlorfon is classified under HS code 2931.54. This substance is an organo-phosphorus compound used primarily as an insecticide. Within Chapter 29 (Organic chemicals), Heading 2931 covers organo-inorganic compounds. Subheading 2931.54 is a specific provision for Trichlorfon (ISO), which is chemically known as dimethyl (2,2,2-trichloro-1-hydroxyethyl)phosphonate. The classification is determined by the presence of a direct carbon-phosphorus bond, which characterizes organo-phosphorus derivatives. This specific subheading was established to facilitate the monitoring of this chemical under international conventions, such as the Rotterdam Convention. It is important to note that this code applies to the pure chemical or technically pure substance. The classification follows GRI 1 and 6, as the chemical is explicitly named in the Harmonized System subheadings. Trichlorfon is a white crystalline solid that is soluble in water and various organic solvents, and its classification remains in Chapter 29 as long as it is not mixed with other ingredients for use as a finished pesticide product.
- Covers
- Pure Trichlorfon (ISO)
- Technically pure dimethyl (2,2,2-trichloro-1-hydroxyethyl)phosphonate
- Trichlorfon in bulk crystalline form
- Trichlorfon dissolved in a solvent (provided it is not a finished preparation)
- Unmixed Trichlorfon for industrial manufacturing
- Also under 2931.54
- Bayer (historical production)
- various generic agrochemical manufacturers
- veterinary pharmaceutical companies (e.g., for livestock dewormers)
Codes often confused with 2931.54
Common mistake. Trichlorfon is often misclassified under HS code 3808.91, which covers insecticides formulated for retail sale or as finished preparations. If the Trichlorfon is mixed with carriers or surfactants to be used directly as a pesticide, it must move to Chapter 38. Another error is using HS code 2931.59, which is the residual category for other organo-phosphorus derivatives. Since Trichlorfon has its own specific subheading (2931.54), the residual code is incorrect.
Top exporters and importers of HS 293154 (the code used for trichlorfon), 2025
In 2025, the largest exporter of HS 293154 (the code used for trichlorfon) in UN Comtrade data was China, with 98% of world exports; the largest importer in UN Comtrade data was Pakistan, with 25% 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 293154, not only trichlorfon.
Top exporters 2025 · share of world exports
- 1 China $2.3M 98% of world exports
- 2 Taiwan* ~$49K 2.1% of world exports · partner records ↗
- 3 Germany $6K 0.3% of world exports
World total: $2.4M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Pakistan $495K 25% of world imports
- 2 Colombia $351K 18% of world imports
- 3 Brazil $205K 11% of world imports
World total: $1.9M 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. UN Comtrade records Taiwan as "Other Asia, not elsewhere specified". Saudi Arabia's exports under that code are left out: they are far too large to be trade with Taiwan, so mostly undisclosed partners. 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 trichlorfon
Brazil classifies trichlorfon under NCM 2931.54.00: HS 2931.54 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about trichlorfon
What is the HS code for Trichlorfon?
The HS code for Trichlorfon is 293154 (Halogenated organo-phosphorous derivatives; trichlorfon (ISO)). The HS code for Trichlorfon is 2931.54, which is the specific code for this organo-phosphorus compound.
How do I classify Trichlorfon for customs?
Trichlorfon is classified under HS code 293154 — Halogenated organo-phosphorous derivatives; trichlorfon (ISO). This is a 6-digit subheading level code.
Is formulated Trichlorfon insecticide classified under 2931.54?
No, if the Trichlorfon is formulated as a finished insecticide for retail sale, it is classified under HS code 3808.91.
Which countries are the top exporters of trichlorfon (HS 293154)?
In 2025, the top exporters of HS 293154 (the code used for trichlorfon) in UN Comtrade data were China ($2.3M, 98% of world exports), Taiwan (about $49K) and Germany ($6K). World exports came to about $2.4M, 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 trichlorfon (HS 293154)?
In 2025, the top importers of HS 293154 (the code used for trichlorfon) in UN Comtrade data were Pakistan ($495K, 25% of world imports), Colombia ($351K) and Brazil ($205K). World imports came to about $1.9M, 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 Trichlorfon the same in all countries?
The base HS code 293154 for Trichlorfon 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 trichlorfon in Brazil?
In Brazil, trichlorfon (HS 293154) is classified under NCM 2931.54.00.