HS code · 6-digit subheading

HS Code 2922.21 – Amino-naphthols and other amino-phenols, other than those containing more than one kind of oxygen function; their ethers and esters; salts thereof, aminohydroxynaphthalenesulphonic acids and their salts

HS code 2922.21 is the 6-digit subheading for amino-naphthols and other amino-phenols, other than those containing more than one kind of oxygen function, their ethers and esters, salts thereof, aminohydroxynaphthalenesulphonic acids and their salts. It is used for H-acid, J-acid, gamma acid, R-acid and chicago acid.

What HS 2922.21 covers

Aminohydroxynaphthalenesulphonic acids and their salts are critical intermediates in the production of dyes and pigments, particularly for the textile, paper, and leather industries. These compounds are valued for their ability to impart vibrant and stable colors. Their complex chemical structure allows for a wide range of derivatives, each offering specific color properties. Beyond dyes, they can also find applications in analytical chemistry as reagents. International trade in these substances is driven by the global demand for colored materials, with major importers and exporters being countries with significant textile manufacturing, printing, and chemical synthesis capabilities. Key things to know include the importance of purity for consistent dye performance, the environmental considerations associated with dye manufacturing, and the continuous innovation in developing new derivatives to meet evolving industry needs for colorfastness and eco-friendliness.

Covers
  • H-acid
  • J-acid
  • Gamma acid
  • R-acid
  • Chicago acid
  • S-acid
  • Naphthionic acid
  • 1-Amino-8-hydroxynaphthalene-3,6-disulfonic acid
Examples
  • BASF (dyes & intermediates)
  • Archroma (textile chemicals)
  • Huntsman (dyes & chemicals)

Codes often confused with 2922.21

Common mistake. This code might be confused with other sulfonated aromatic compounds (e.g., 2904.99) or other amino-phenols (292229), but 292221 specifically covers the aminohydroxynaphthalenesulphonic acids and their salts.

2904.99Derivatives of hydrocarbons n.e.c. in heading no. 2904, whether or not halogenated2922.29Amino-naphthols and other amino-phenols, other than those containing more than one kind of oxygen function, their ethers and esters; salts thereof n.e.c. in item no. 2922.2

Top exporters and importers of HS code 292221, 2025

In 2025, the largest exporter of HS code 292221 in UN Comtrade data was China, with 59% of world exports; the largest importer in UN Comtrade data was India, with 38% 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. 1 China $94M
  2. 2 India $62M
  3. 3 Saudi Arabia $608K

World total: $158M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 India $54M
  2. 2 South Korea $28M
  3. 3 China $25M

World total: $143M 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 2922.21

Brazil does not split HS 2922.21: its NCM code is 2922.21.00.

  1. 2922.21.00 Aminohydroxynaphthalenesulphonic acids and saltsÁcidos aminohidroxinaftalenossulfônicos e seus sais

All Brazil NCM codes in heading 29.22 →

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.

Questions about HS 2922.21

What is HS code 292221?

HS code 292221 is a 6-digit subheading in the Harmonized System that covers: Amino-naphthols and other amino-phenols, other than those containing more than one kind of oxygen function; their ethers and esters; salts thereof, aminohydroxynaphthalenesulphonic acids and their salts. Aminohydroxynaphthalenesulphonic acids and their salts are critical intermediates in the production of dyes and pigments, particularly for the textile, paper, and leather industries. These compounds are valued for their ability to impart vibrant and stable colors. Their complex chemical structure allows for a wide range of derivatives, each offering specific color properties. Beyond dyes, they can also find applications in analytical chemistry as reagents. International trade in these substances is driven by the global demand for colored materials, with major importers and exporters being countries with significant textile manufacturing, printing, and chemical synthesis capabilities. Key things to know include the importance of purity for consistent dye performance, the environmental considerations associated with dye manufacturing, and the continuous innovation in developing new derivatives to meet evolving industry needs for colorfastness and eco-friendliness.

What products fall under HS code 292221?

H-acid, J-acid, Gamma acid, R-acid, Chicago acid, S-acid, Naphthionic acid, 1-Amino-8-hydroxynaphthalene-3,6-disulfonic acid

What are common misclassifications for HS code 292221?

This code might be confused with other sulfonated aromatic compounds (e.g., 2904.99) or other amino-phenols (292229), but 292221 specifically covers the aminohydroxynaphthalenesulphonic acids and their salts.

Which countries are the top exporters of goods under HS code 292221?

In 2025, the top exporters of HS code 292221 in UN Comtrade data were China ($94M, 59% of world exports), India ($62M) and Saudi Arabia ($608K). World exports came to about $158M, 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 292221?

In 2025, the top importers of HS code 292221 in UN Comtrade data were India ($54M, 38% of world imports), South Korea ($28M) and China ($25M). World imports came to about $143M, 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 292221 structured?

HS code 292221 is a 6-digit subheading under the Harmonized System. The first 2 digits (29) identify the chapter, digits 3-4 (22) identify the heading, and digits 5-6 (21) specify the subheading. This code is standardized globally by the World Customs Organization.

What is the Brazil NCM code for HS code 292221?

In Brazil, HS code 292221 is NCM 2922.21.00. The last two digits are 00 because Brazil does not split this HS code further.