Product classification

HS code for Trimethylamine: 2921.11

Amine-function compounds, acyclic monoamines and their derivatives, methylamine, di- or trimethylamine and their salts.

Classification of trimethylamine under HS 2921.11

Trimethylamine is classified under HS code 2921.11. This classification falls within Chapter 29 for organic chemicals, specifically under the section for amine-function compounds. The code 2921.11 is a specific subheading that covers methylamine, dimethylamine, and trimethylamine, as well as their salts. The classification is determined by the chemical structure of the molecule (CH3)3N, which is an acyclic monoamine. Whether the substance is in its pure gaseous form, a compressed liquefied gas, or an aqueous solution, it remains under this heading as long as it is not mixed with other ingredients that would transform it into a prepared chemical product or a medicament. The salts of trimethylamine, such as its hydrochloride form, are also explicitly included in this subheading per the HS nomenclature.

Covers
  • Pure trimethylamine gas
  • Trimethylamine in aqueous solution
  • Trimethylamine hydrochloride
  • Anhydrous trimethylamine
  • Liquefied trimethylamine under pressure
Also under 2921.11
  • BASF (methylamines)
  • Taminco (now part of Eastman Chemical, methylamines)
  • Arkema (various amines)

Codes often confused with 2921.11

Common mistake. Trimethylamine is sometimes misclassified under HS code 2921.19, which is the residual category for "other" acyclic monoamines. However, because trimethylamine is specifically named in the 2921.11 subheading, the specific code must take precedence over the general one. Another error involves classifying aqueous solutions under Chapter 38 (Miscellaneous chemical products), but Chapter 29 Note 1(f) allows for chemicals dissolved in water to remain in Chapter 29.

2921.19Amine-function compounds; acyclic monoamines and their derivatives, and salts thereof, n.e.c. in item no. 2921.1

Top exporters and importers of HS 292111 (the code used for trimethylamine), 2025

In 2025, the largest exporter of HS 292111 (the code used for trimethylamine) in UN Comtrade data was Belgium, with 26% of world exports; the largest importer in UN Comtrade data was India, with 16% 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 292111, not only trimethylamine.

Top exporters 2025 · share of world exports

  1. 1 Belgium $66M
  2. 2 India $62M
  3. 3 South Korea $24M

World total: $249M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 India $62M
  2. 2 Oman $37M
  3. 3 France $28M

World total: $383M 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 codes for trimethylamine

Brazil splits HS 2921.11 into 9 NCM codes. Pick the one that matches your product:

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.

Questions about trimethylamine

What is the HS code for Trimethylamine?

The HS code for Trimethylamine is 292111 (Amine-function compounds; acyclic monoamines and their derivatives, methylamine, di- or trimethylamine and their salts). The specific HS code for trimethylamine and its salts is 2921.11.

How do I classify Trimethylamine for customs?

Trimethylamine is classified under HS code 292111 — Amine-function compounds; acyclic monoamines and their derivatives, methylamine, di- or trimethylamine and their salts. This is a 6-digit subheading level code.

Does the HS code change if it is in a water solution?

No, trimethylamine dissolved in water remains under HS code 2921.11, as Chapter 29 permits substances dissolved in water to retain their classification as pure chemicals.

Which countries are the top exporters of trimethylamine (HS 292111)?

In 2025, the top exporters of HS 292111 (the code used for trimethylamine) in UN Comtrade data were Belgium ($66M, 26% of world exports), India ($62M) and South Korea ($24M). World exports came to about $249M, 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 trimethylamine (HS 292111)?

In 2025, the top importers of HS 292111 (the code used for trimethylamine) in UN Comtrade data were India ($62M, 16% of world imports), Oman ($37M) and France ($28M). World imports came to about $383M, 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 Trimethylamine the same in all countries?

The base HS code 292111 for Trimethylamine 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 trimethylamine in Brazil?

Brazil splits HS 292111 into 9 NCM codes, so the right one for trimethylamine depends on the product's details: 2921.11.11 (Monomethylamine), 2921.11.12 (Monomethylamine salts), 2921.11.21 (Dimethylamine), 2921.11.22 (Dimethylamine 2,4-dichlorophenoxyacetate), 2921.11.23 (Dimethylamine methylchlorophenoxyacetate), 2921.11.29 (Other dimethylamine salts), and more.