HS code · 6-digit subheading
HS Code 2921.29 – Amine-function compounds; acyclic polyamines and their derivatives, and salts thereof, n.e.c. in item no. 2921.2
HS code 2921.29 is the 6-digit subheading for amine-function compounds, acyclic polyamines and their derivatives, and salts thereof, n.e.c. in item no. 2921.2. It is used for diethylenetriamine, triethylenetetramine, tetraethylenepentamine, spermidine and spermine.
What HS 2921.29 covers
This 'other' HS code covers acyclic polyamines and their derivatives, and salts thereof, not specifically listed in subheadings 292121 or 292122. This category encompasses a diverse range of polyamines with multiple amine functional groups in an open-chain structure, excluding ethylenediamine and hexamethylenediamine. Importers and exporters typically include specialty chemical companies, polymer research and development firms, and manufacturers of advanced materials. These polyamines are utilized in specialized polymer synthesis, as epoxy curing agents, cross-linking agents, and in the production of various high-performance materials. Trade in these 'other' polyamines often involves custom orders and smaller volumes of high-value chemicals, where precise chemical identification, purity, and adherence to specific technical requirements are crucial.
- Covers
- Diethylenetriamine
- Triethylenetetramine
- Tetraethylenepentamine
- Spermidine
- Spermine
- Propylenediamine
- Butylenediamine
- Examples
- Dow Chemical (various polyamines)
- Huntsman Corporation (epoxy curing agents)
- Taminco (now Eastman Chemical, specialty polyamines)
Codes often confused with 2921.29
Common mistake. As a residual category, misclassification often occurs when a specific polyamine should have been classified under 292121 or 292122, or if it is mistakenly identified as a monoamine (29211x series).
Top exporters and importers of HS code 292129, 2025
In 2025, the largest exporter of HS code 292129 in UN Comtrade data was the Netherlands, with 15% of world exports; the largest importer in UN Comtrade data was China, with 14% 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 Netherlands $191M 15% of world exports
- 2 Japan $187M 15% of world exports
- 3 China $170M 14% of world exports
World total: $1.2B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 China $168M 14% of world imports
- 2 United States $142M 12% of world imports
- 3 India $113M 9.2% of world imports
World total: $1.2B 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 2921.29 3
Brazil splits HS 2921.29 into 3 NCM codes, Mercosur's 8-digit tariff lines.
- 2921.29.10 Diethylenetriamine and its saltsDietilenotriamina e seus sais
- 2921.29.20 Triethylenetetramine and its saltsTrietilenotetramina e seus sais
- 2921.29.90 Other acyclic polyamines, derivatives and saltsOutros
All Brazil NCM codes in heading 29.21 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 2921.29
What is HS code 292129?
HS code 292129 is a 6-digit subheading in the Harmonized System that covers: Amine-function compounds; acyclic polyamines and their derivatives, and salts thereof, n.e.c. in item no. 2921.2. This 'other' HS code covers acyclic polyamines and their derivatives, and salts thereof, not specifically listed in subheadings 292121 or 292122. This category encompasses a diverse range of polyamines with multiple amine functional groups in an open-chain structure, excluding ethylenediamine and hexamethylenediamine. Importers and exporters typically include specialty chemical companies, polymer research and development firms, and manufacturers of advanced materials. These polyamines are utilized in specialized polymer synthesis, as epoxy curing agents, cross-linking agents, and in the production of various high-performance materials. Trade in these 'other' polyamines often involves custom orders and smaller volumes of high-value chemicals, where precise chemical identification, purity, and adherence to specific technical requirements are crucial.
What products fall under HS code 292129?
Diethylenetriamine, Triethylenetetramine, Tetraethylenepentamine, Spermidine, Spermine, Propylenediamine, Butylenediamine
What are common misclassifications for HS code 292129?
As a residual category, misclassification often occurs when a specific polyamine should have been classified under 292121 or 292122, or if it is mistakenly identified as a monoamine (29211x series).
Which countries are the top exporters of goods under HS code 292129?
In 2025, the top exporters of HS code 292129 in UN Comtrade data were the Netherlands ($191M, 15% of world exports), Japan ($187M) and China ($170M). World exports came to about $1.2B, 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 292129?
In 2025, the top importers of HS code 292129 in UN Comtrade data were China ($168M, 14% of world imports), the United States ($142M) and India ($113M). World imports came to about $1.2B, 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 292129 structured?
HS code 292129 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (21) identify the heading, and digits 5-6 (29) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 292129?
Brazil splits HS code 292129 into 3 NCM codes: 2921.29.10 (Diethylenetriamine and its salts), 2921.29.20 (Triethylenetetramine and its salts), 2921.29.90 (Other acyclic polyamines, derivatives and salts). The first 6 digits of each match the HS code.