HS code · 6-digit subheading
HS Code 2921.59 – Amine-function compounds; aromatic polyamines and their derivatives, other than item no. 2921.51
HS code 2921.59 is the 6-digit subheading for amine-function compounds, aromatic polyamines and their derivatives, other than item no. 2921.51. It is used for 4,4'-Diaminodiphenylmethane (MDA), 4,4'-Diaminodiphenyl sulfone (DDS), benzidine (restricted), xylylenediamine and 1,5-Naphthalenediamine.
What HS 2921.59 covers
This 'other' category for aromatic polyamines and their derivatives, excluding those specified in 292151, covers a broad range of compounds with multiple amine groups attached to aromatic rings. These are essential intermediates for high-performance polymers, resins, epoxy curing agents, and specialty coatings. They often provide enhanced thermal stability, mechanical strength, or chemical resistance to final products, making them valuable in demanding applications across various industries. Trade involves specialized chemical manufacturers supplying to advanced materials industries, aerospace, electronics, and automotive sectors. Importers are typically manufacturers of high-tech materials, while exporters are often global chemical companies with expertise in complex organic synthesis. Purity and specific structural characteristics are paramount.
- Covers
- 4,4'-Diaminodiphenylmethane (MDA)
- 4,4'-Diaminodiphenyl sulfone (DDS)
- Benzidine (restricted)
- Xylylenediamine
- 1,5-Naphthalenediamine
- 2,7-Naphthalenediamine
- 3,3'-Dichlorobenzidine
- Examples
- Huntsman (epoxy curing agents)
- BASF (polymer intermediates)
- Solvay (high-performance polymers)
- Evonik (specialty polyamines)
- Mitsubishi Chemical (advanced materials)
Codes often confused with 2921.59
Common mistake. This code is for polyamines not covered by 292151; misclassification can occur if a specific polyamine is mistakenly placed in 292151 or if a monoamine is incorrectly placed here, requiring careful structural analysis.
Top exporters and importers of HS code 292159, 2025
In 2025, the largest exporter of HS code 292159 in UN Comtrade data was China, with 26% of world exports; the largest importer in UN Comtrade data was the United States, with 19% 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 China $129M 26% of world exports
- 2 India $79M 16% of world exports
- 3 Japan $75M 15% of world exports
World total: $505M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $100M 19% of world imports
- 2 Germany $50M 9.6% of world imports
- 3 Brazil $43M 8.3% of world imports
World total: $521M 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 2921.59 8
Brazil splits HS 2921.59 into 8 NCM codes, Mercosur's 8-digit tariff lines.
- 2921.59.1 Benzidine and its derivatives; salts thereofBenzidina e seus derivados; sais destes produtos Group
- 2921.59.11 3,3'-Dichlorobenzidine3,3'-Diclorobenzidina
- 2921.59.19 Benzidine, its other derivatives and saltsOutros
- 2921.59.2 DiaminodiphenylmethanesDiaminodifenilmetanos Group
- 2921.59.21 4,4'-Diaminodiphenylmethane4,4'-Diaminodifenilmetano
- 2921.59.29 Other diaminodiphenylmethanesOutros
- 2921.59.3 Diaminodiphenylamines and their derivatives; salts thereofDiaminodifenilaminas e seus derivados; sais destes produtos Group
- 2921.59.31 4,4'-Diaminodiphenylamine and its salts4,4'-Diaminodifenilamina e seus sais
- 2921.59.32 4,4'-Diaminodiphenylamine-2-sulphonic acid, saltsÁcido 4,4'-diaminodifenilamino-2-sulfônico e seus sais
- 2921.59.39 Other diaminodiphenylamines, derivatives, saltsOutros
- 2921.59.90 Other aromatic 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 2921.59
What is HS code 292159?
HS code 292159 is a 6-digit subheading in the Harmonized System that covers: Amine-function compounds; aromatic polyamines and their derivatives, other than item no. 2921.51. This 'other' category for aromatic polyamines and their derivatives, excluding those specified in 292151, covers a broad range of compounds with multiple amine groups attached to aromatic rings. These are essential intermediates for high-performance polymers, resins, epoxy curing agents, and specialty coatings. They often provide enhanced thermal stability, mechanical strength, or chemical resistance to final products, making them valuable in demanding applications across various industries. Trade involves specialized chemical manufacturers supplying to advanced materials industries, aerospace, electronics, and automotive sectors. Importers are typically manufacturers of high-tech materials, while exporters are often global chemical companies with expertise in complex organic synthesis. Purity and specific structural characteristics are paramount.
What products fall under HS code 292159?
4,4'-Diaminodiphenylmethane (MDA), 4,4'-Diaminodiphenyl sulfone (DDS), Benzidine (restricted), Xylylenediamine, 1,5-Naphthalenediamine, 2,7-Naphthalenediamine, 3,3'-Dichlorobenzidine
What are common misclassifications for HS code 292159?
This code is for polyamines not covered by 292151; misclassification can occur if a specific polyamine is mistakenly placed in 292151 or if a monoamine is incorrectly placed here, requiring careful structural analysis.
Which countries are the top exporters of goods under HS code 292159?
In 2025, the top exporters of HS code 292159 in UN Comtrade data were China ($129M, 26% of world exports), India ($79M) and Japan ($75M). World exports came to about $505M, 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 292159?
In 2025, the top importers of HS code 292159 in UN Comtrade data were the United States ($100M, 19% of world imports), Germany ($50M) and Brazil ($43M). World imports came to about $521M, 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 292159 structured?
HS code 292159 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 (59) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 292159?
Brazil splits HS code 292159 into 8 NCM codes: 2921.59.11 (3,3'-Dichlorobenzidine), 2921.59.19 (Benzidine, its other derivatives and salts), 2921.59.21 (4,4'-Diaminodiphenylmethane), 2921.59.29 (Other diaminodiphenylmethanes), 2921.59.31 (4,4'-Diaminodiphenylamine and its salts), 2921.59.32 (4,4'-Diaminodiphenylamine-2-sulphonic acid, salts), 2921.59.39 (Other diaminodiphenylamines, derivatives, salts), 2921.59.90 (Other aromatic polyamines, derivatives and salts). The first 6 digits of each match the HS code.