HS code · 6-digit subheading
HS Code 2921.44 – Amine-function compounds; aromatic monoamines and their derivatives, diphenylamine and its derivatives; salts thereof
HS code 2921.44 is the 6-digit subheading for amine-function compounds, aromatic monoamines and their derivatives, diphenylamine and its derivatives, salts thereof. It is used for diphenylamine, N-nitrosodiphenylamine, 4-hydroxydiphenylamine, diphenylamine hydrochloride and alkylated diphenylamines.
What HS 2921.44 covers
This HS code covers diphenylamine (DPA) and its derivatives, including their salts. Diphenylamine is a crucial aromatic monoamine primarily valued for its antioxidant properties, making it indispensable in the rubber and plastics industries, particularly for tires and other elastomeric products. It also serves as an intermediate for the synthesis of dyes, pharmaceuticals, and explosives. Trade involves chemical companies supplying DPA and its derivatives to tire manufacturers, polymer producers, and specialty chemical sectors globally. Importers seek DPA for its ability to inhibit oxidation and polymerization, extending product lifespan. Exporters are typically large chemical producers. Key trade considerations include purity, specific derivative, and compliance with environmental and safety regulations.
- Covers
- Diphenylamine
- N-nitrosodiphenylamine
- 4-hydroxydiphenylamine
- Diphenylamine hydrochloride
- Alkylated diphenylamines
- Octylated diphenylamine
- Examples
- Lanxess (DPA-based antioxidants)
- Eastman (DPA derivatives)
- Kumho Petrochemical (rubber chemicals)
- Sinopec (DPA production)
- Sumitomo Chemical (specialty chemicals)
Codes often confused with 2921.44
Common mistake. Could be confused with other aromatic monoamines (292149) or even aromatic polyamines (292159) if the specific diphenylamine structure, with two phenyl groups attached to a nitrogen, is not clearly identified.
Top exporters and importers of HS code 292144, 2025
In 2025, the largest exporter of HS code 292144 in UN Comtrade data was China, with 48% of world exports; the largest importer in UN Comtrade data was Thailand, with 21% 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 $90M 48% of world exports
- 2 United States $57M 30% of world exports
- 3 Canada $13M 7.0% of world exports
World total: $188M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Thailand $38M 21% of world imports
- 2 South Korea $33M 18% of world imports
- 3 India $21M 11% of world imports
World total: $181M 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 2921.44 4
Brazil splits HS 2921.44 into 4 NCM codes, Mercosur's 8-digit tariff lines.
- 2921.44.10 Diphenylamine and its saltsDifenilamina e seus sais
- 2921.44.2 Diphenylamine derivatives; salts thereofDerivados da difenilamina; sais destes produtos Group
- 2921.44.21 n-Octyldiphenylaminen-Octildifenilamina
- 2921.44.22 n-Nonyldiphenylaminen-Nonildifenilamina
- 2921.44.29 Other diphenylamine derivatives and their 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 2921.44
What is HS code 292144?
HS code 292144 is a 6-digit subheading in the Harmonized System that covers: Amine-function compounds; aromatic monoamines and their derivatives, diphenylamine and its derivatives; salts thereof. This HS code covers diphenylamine (DPA) and its derivatives, including their salts. Diphenylamine is a crucial aromatic monoamine primarily valued for its antioxidant properties, making it indispensable in the rubber and plastics industries, particularly for tires and other elastomeric products. It also serves as an intermediate for the synthesis of dyes, pharmaceuticals, and explosives. Trade involves chemical companies supplying DPA and its derivatives to tire manufacturers, polymer producers, and specialty chemical sectors globally. Importers seek DPA for its ability to inhibit oxidation and polymerization, extending product lifespan. Exporters are typically large chemical producers. Key trade considerations include purity, specific derivative, and compliance with environmental and safety regulations.
What products fall under HS code 292144?
Diphenylamine, N-nitrosodiphenylamine, 4-hydroxydiphenylamine, Diphenylamine hydrochloride, Alkylated diphenylamines, Octylated diphenylamine
What are common misclassifications for HS code 292144?
Could be confused with other aromatic monoamines (292149) or even aromatic polyamines (292159) if the specific diphenylamine structure, with two phenyl groups attached to a nitrogen, is not clearly identified.
Which countries are the top exporters of goods under HS code 292144?
In 2025, the top exporters of HS code 292144 in UN Comtrade data were China ($90M, 48% of world exports), the United States ($57M) and Canada ($13M). World exports came to about $188M, 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 292144?
In 2025, the top importers of HS code 292144 in UN Comtrade data were Thailand ($38M, 21% of world imports), South Korea ($33M) and India ($21M). World imports came to about $181M, 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 292144 structured?
HS code 292144 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 (44) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 292144?
Brazil splits HS code 292144 into 4 NCM codes: 2921.44.10 (Diphenylamine and its salts), 2921.44.21 (n-Octyldiphenylamine), 2921.44.22 (n-Nonyldiphenylamine), 2921.44.29 (Other diphenylamine derivatives and their salts). The first 6 digits of each match the HS code.