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U.S. imports of aromatic polyamines (nesoi) and their derivatives (HS 292159) totaled $7.8M in July 2026, traded with 12 countries.
Importers of Aromatic Polyamines (NESOI) and Their Derivatives paid $1.1M in duties in July 2026 — an effective duty rate of 16% on $7.1M in dutiable value, based on actual customs collections rather than the published tariff schedule. Aromatic Polyamines (NESOI) and Their Derivatives imports of $7.8M in July 2026 ran 16% above the year-to-date monthly average of $6.7M.
Last updated: July 2026 data4,4'-Methylenedianiline (MDA, at 2921593000) is a critical precursor to MDI-based polyurethanes and is widely traded for use in adhesives, coatings, and elastomers, while 4,4-diamino-2,2-stilbenedisulfonic acid (2921592000) serves as a fluorescent whitening agent intermediate. Japan and India are the leading US suppliers under this heading, with Switzerland and China also notable sources. The presence of 3,3'-dichlorobenzidine dihydrochloride (2921598010) — a regulated carcinogen — means that certain lines may attract heightened scrutiny from EPA and OSHA compliance programs in addition to standard CBP entry requirements.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
87 shipments/mo
3,3'-Dichlorobenzidine is classified as a probable human carcinogen and is subject to EPA Toxic Substances Control Act (TSCA) reporting and recordkeeping requirements. Importers must ensure TSCA compliance certification is filed at entry, and downstream handling is subject to OSHA hazard communication standards.
MDA (4,4'-methylenedianiline) is an aromatic diamine classified at 2921593000, while MDI (methylene diphenyl diisocyanate) is an isocyanate classified in a different chapter. The two are chemically related but structurally distinct; classification hinges on whether the nitrogen functional group is an amine or an isocyanate, and misclassification between chapters can result in significant duty differences.
HSChapter 29
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Subheading 5 of 18 in heading 2921
Subheading 292159 · $7.8M of $80.2M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2921598090 | Aromatic Polyamines & Derivatives & Salts NESOI | $3.3M | 9.16% | 97.63% | $305K |
| 2921591700 | 4,4'-Benzidn-2,2'-Disulfonc Acd;1,4-Diaminbenz Etc | $2.1M | 10.62% | 67.52% | $219K |
| 2921590800 | 5-Amino-2-(P-Aminoanilino)-Benzenesulfon Acid Etc | $884K | 36.90% | 100.00% | $326K |
| 2921594000 | Arom Polyamines Etc of Prod in U.s.note 3 Sect 6 | $634K | 11.05% | 102.13% | $70K |
| 2921593000 | 4,4-Methylenedianiline | $419K | 19.01% | 100.00% | $80K |
| 2921592000 | 4,4-Diamino-2,2-Stilbenedisulfonic Acid | $302K | 26.63% | 100.00% | $81K |
| 2921598010 | 3,3'-Dichlorobenzidine Dihydrochloride | $111K | 6.50% | 100.00% | $7K |
| 2921590400 | 1,8-Diaminonapthalene (1,8-Napthalenediamino) | $58K | 35.00% | 100.00% | $20K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2921590000 | Aromatic Polyamines and Their Derivatives, NESOI | $1.8M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$7.8MYoY · Pro
Exports
$1.8MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
India and Japan together supply 55% of it.
customs district
destination
entry
rate provision · imports
6.6% enters free of duty; the effective duty rate is 14.20%.