Product classification
HS code for Hexamethylenediamine: 2921.22
Amine-function compounds, acyclic polyamines and their derivatives, hexamethylenediamine and its salts.
Classification of hexamethylenediamine under HS 2921.22
Hexamethylenediamine and its salts are classified under HS code 2921.22. This classification is situated in Chapter 29 (Organic chemicals), specifically under heading 2921, which covers amine-function compounds. Hexamethylenediamine (also known as 1,6-diaminohexane) is an acyclic polyamine. The HS code 2921.22 is a specific "named" subheading, meaning the substance is explicitly identified by its chemical name in the tariff schedule. This chemical is a vital industrial intermediate, primarily used in the production of Nylon 6,6. The classification includes not only the base chemical but also its salts, such as hexamethylenediamine adipate, which is the precursor "nylon salt" formed by reacting the diamine with adipic acid. Accurate classification is essential because this substance is often subject to specific safety regulations and industrial standards due to its corrosive nature and its role as a precursor in polymer science. When classifying this product, it is important to verify the purity and the chemical structure. While the base chemical is acyclic, it is often confused with cyclic amines or other polyamines. However, the specific carbon chain length (six carbons) and the presence of two amine groups at the ends of the chain define its classification under 2921.22. This code allows for precise tracking of the chemical's movement in the global supply chain.
- Covers
- Hexamethylenediamine (1,6-hexanediamine)
- Hexamethylenediamine adipate (Nylon salt)
- Hexamethylenediamine dihydrochloride
- Hexamethylenediamine phosphate
- Aqueous solutions of hexamethylenediamine
- Also under 2921.22
- Invista (HMDA for Nylon 6,6)
- Ascend Performance Materials (HMDA for Nylon 6,6)
- BASF (HMDA production)
Codes often confused with 2921.22
Common mistake. Hexamethylenediamine is sometimes confused with ethylenediamine, which is classified under HS code 2921.21. While both are acyclic polyamines, the carbon chain length is the distinguishing factor. Another common error is classifying the finished polymer (Nylon) under 3908, whereas the raw chemical precursor must remain in 2921.22.
Top exporters and importers of HS 292122 (the code used for hexamethylenediamine), 2025
In 2025, the largest exporter of HS 292122 (the code used for hexamethylenediamine) in UN Comtrade data was the United States, with 44% of world exports; the largest importer in UN Comtrade data was Germany, with 31% 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 292122, not only hexamethylenediamine.
Top exporters 2025 · share of world exports
- 1 United States $480M 44% of world exports
- 2 France $479M 44% of world exports
- 3 China $40M 3.7% of world exports
World total: $1.1B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Germany $314M 31% of world imports
- 2 Japan $191M 19% of world imports
- 3 Canada $95M 9.5% of world imports
World total: $1.0B 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 hexamethylenediamine
Brazil classifies hexamethylenediamine under NCM 2921.22.00: HS 2921.22 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about hexamethylenediamine
What is the HS code for Hexamethylenediamine?
The HS code for Hexamethylenediamine is 292122 (Amine-function compounds; acyclic polyamines and their derivatives, hexamethylenediamine and its salts). The HS code for hexamethylenediamine and its salts is 2921.22.
How do I classify Hexamethylenediamine for customs?
Hexamethylenediamine is classified under HS code 292122 — Amine-function compounds; acyclic polyamines and their derivatives, hexamethylenediamine and its salts. This is a 6-digit subheading level code.
Is hexamethylenediamine adipate classified here?
Yes, as a salt of hexamethylenediamine, the adipate version (nylon salt) is correctly classified under 2921.22.
Which countries are the top exporters of hexamethylenediamine (HS 292122)?
In 2025, the top exporters of HS 292122 (the code used for hexamethylenediamine) in UN Comtrade data were the United States ($480M, 44% of world exports), France ($479M) and China ($40M). World exports came to about $1.1B, 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 hexamethylenediamine (HS 292122)?
In 2025, the top importers of HS 292122 (the code used for hexamethylenediamine) in UN Comtrade data were Germany ($314M, 31% of world imports), Japan ($191M) and Canada ($95M). World imports came to about $1.0B, 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 Hexamethylenediamine the same in all countries?
The base HS code 292122 for Hexamethylenediamine 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 hexamethylenediamine in Brazil?
In Brazil, hexamethylenediamine (HS 292122) is classified under NCM 2921.22.00.