Product classification

HS code for Diphenylamine: 2921.44

Amine-function compounds, aromatic monoamines and their derivatives, diphenylamine and its derivatives, salts thereof.

Classification of diphenylamine under HS 2921.44

Diphenylamine and its derivatives are classified under HS code 2921.44. This classification is situated within Chapter 29 (Organic Chemicals) and heading 2921, which covers amine-function compounds. Specifically, diphenylamine is an aromatic monoamine, where the nitrogen atom is attached to two phenyl groups. Subheading 2921.44 is the specific provision for diphenylamine, its derivatives, and their salts. This chemical is widely used as a stabilizer in nitrocellulose-based explosives, an antioxidant in the rubber industry, and as a post-harvest fungicide for fruit. The classification is determined by the molecular structure of the secondary aromatic amine. Under the Harmonized System, the presence of the two aromatic rings directly bonded to the amine group necessitates its placement in this specific subheading.

Covers
  • Diphenylamine (pure)
  • Octylated diphenylamine
  • Nonylated diphenylamine
  • Diphenylamine hydrochloride (salt)
  • Diphenylamine sulfate (salt)
Also under 2921.44
  • 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. Diphenylamine is often confused with 2921.41 (Aniline and its salts) or 2921.43 (Toluidines and their derivatives). While these are all aromatic monoamines, the number of phenyl groups and the presence of methyl groups on the ring differentiate them. It may also be misclassified under 3811.21 or 3812.39 if it is part of a prepared additive or antioxidant mixture, but the pure chemical remains in 2921.44.

2921.41Amine-function compounds; aromatic monoamines and their derivatives, aniline and its salts2921.43Amine-function compounds; aromatic monoamines and their derivatives, toluidines and their derivatives; salts thereof3811.21Lubricating oil additives; containing petroleum oils or oils obtained from bituminous minerals3812.39Anti-oxidising preparations and other compound stabilisers; for rubber or plastics, other than mixtures of oligomers of 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ)

Top exporters and importers of HS 292144 (the code used for diphenylamine), 2025

In 2025, the largest exporter of HS 292144 (the code used for diphenylamine) 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.

Figures cover everything classified under HS 292144, not only diphenylamine.

Top exporters 2025 · share of world exports

  1. 1 China $90M
  2. 2 United States $57M
  3. 3 Canada $13M

World total: $188M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 Thailand $38M
  2. 2 South Korea $33M
  3. 3 India $21M

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 diphenylamine

Brazil splits HS 2921.44 into 4 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 diphenylamine

What is the HS code for Diphenylamine?

The HS code for Diphenylamine is 292144 (Amine-function compounds; aromatic monoamines and their derivatives, diphenylamine and its derivatives; salts thereof). The HS code for Diphenylamine and its derivatives is 2921.44.

How do I classify Diphenylamine for customs?

Diphenylamine is classified under HS code 292144 — Amine-function compounds; aromatic monoamines and their derivatives, diphenylamine and its derivatives; salts thereof. This is a 6-digit subheading level code.

Is octylated diphenylamine classified here?

Yes, octylated diphenylamine is considered a derivative of diphenylamine and is classified under HS code 2921.44.

Which countries are the top exporters of diphenylamine (HS 292144)?

In 2025, the top exporters of HS 292144 (the code used for diphenylamine) 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 diphenylamine (HS 292144)?

In 2025, the top importers of HS 292144 (the code used for diphenylamine) 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.

Is the HS code for Diphenylamine the same in all countries?

The base HS code 292144 for Diphenylamine 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 diphenylamine in Brazil?

Brazil splits HS 292144 into 4 NCM codes, so the right one for diphenylamine depends on the product's details: 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).