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HSChapter 29
U.S. imports of aromatic polyamines (nesoi) and their derivatives (HS 292159) totaled $6.9M in April 2026, traded with 11 countries.
Importers of Aromatic Polyamines (NESOI) and Their Derivatives paid $1.0M in duties in April 2026 — an effective duty rate of 15% on $6.8M in dutiable value, based on actual customs collections rather than the published tariff schedule. Aromatic Polyamines (NESOI) and Their Derivatives imports of $6.9M in April 2026 ran 21% above the year-to-date monthly average of $5.7M.
Last updated: April 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.
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.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| SWITZERLAND | $2.0M | -- | -$2.0M |
| JAPAN | $1.4M | $353K | -$1.1M |
| CHINA | $1.5M | $17K | -$1.5M |
| INDIA | $1.4M | $99K | -$1.3M |
| KOREA, SOUTH | $63K | $418K | +$354K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2921598090 | AROMATIC POLYAMINES & DERIVATIVES & SALTS NESOI | $3.8M | 10.15% | $379K |
| 2921591700 | 4,4'-BENZIDN-2,2'-DISULFONC ACD;1,4-DIAMINBENZ ETC | $1.7M | 18.54% | $304K |
| 2921594000 | AROM POLYAMINES ETC OF PROD IN U.S.NOTE 3 SECT 6 | $642K | 14.07% | $85K |
| 2921590800 | 5-AMINO-2-(P-AMINOANILINO)-BENZENESULFON ACID ETC | $476K | 34.73% | $165K |
| 2921593000 | 4,4-METHYLENEDIANILINE | $215K | 16.50% | $35K |
| 2921592000 | 4,4-DIAMINO-2,2-STILBENEDISULFONIC ACID | $106K | 28.85% | $31K |
| 2921598010 | 3,3'-DICHLOROBENZIDINE DIHYDROCHLORIDE | $42K | 6.50% | $3K |
| 2921590400 | 1,8-DIAMINONAPTHALENE (1,8-NAPTHALENEDIAMINO) | $0 | -- | -- |
AROMATIC POLYAMINES & DERIVATIVES & SALTS NESOI
4,4'-BENZIDN-2,2'-DISULFONC ACD;1,4-DIAMINBENZ ETC
AROM POLYAMINES ETC OF PROD IN U.S.NOTE 3 SECT 6
5-AMINO-2-(P-AMINOANILINO)-BENZENESULFON ACID ETC
4,4-METHYLENEDIANILINE
4,4-DIAMINO-2,2-STILBENEDISULFONIC ACID
3,3'-DICHLOROBENZIDINE DIHYDROCHLORIDE
1,8-DIAMINONAPTHALENE (1,8-NAPTHALENEDIAMINO)
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2921590000 | AROMATIC POLYAMINES AND THEIR DERIVATIVES, NESOI | $1.7M |
AROMATIC POLYAMINES AND THEIR DERIVATIVES, NESOI
355.8K kg
NUCLEIC ACIDS & SALTS; OTHER HETEROCYCLIC CMP, NES
HS 293499
HETEROCYCLIC COMP W NITROGEN HETERO-ATM ONLY NESOI
HS 293399
POLYPEPTIDE PROTEIN& GLYCOPROTEIN HORMONES &DERIV
HS 293719
CMPDS CONT AN UNFUSED PYRIDINE RING ETC NESOI
HS 293339
COMP WITH PYRIMIDINE OR PIPERAZINE RING, NESOI
HS 293359
ANTIBIOTICS, NESOI
HS 294190
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $663K | $1.2M | +$548K |
| Georgia | $1.3M | $16K | -$1.3M |
| California | $618K | $64K | -$555K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | $586K | $1.3M | +$705K |
| SAVANNAH, GA | $1.1M | -- | -$1.1M |
| LOS ANGELES, CA | $839K | -- | -$839K |