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HSChapter 29
U.S. imports of aromatic polycarboxylic acids, anhydrides & derivatives (nesoi) (HS 291739) totaled $29.3M in April 2026, traded with 19 countries.
Importers of Aromatic Polycarboxylic Acids, Anhydrides & Derivatives (NESOI) paid $4.3M in duties in April 2026 — an effective duty rate of 17% on $24.8M in dutiable value, based on actual customs collections rather than the published tariff schedule. Aromatic Polycarboxylic Acids, Anhydrides & Derivatives (NESOI) imports of $29.3M in April 2026 ran 26% above the year-to-date monthly average of $23.2M.
Last updated: April 2026 dataCovering a broad residual basket of aromatic polycarboxylic acids and their halides, peroxides, anhydrides, and esters not elsewhere specified, this heading encompasses commercially significant intermediates such as isophthalic acid (2917391500), tetrabromophthalic anhydride (2917391700), and naphthalic anhydride (2917390800). South Korea and India are the leading US suppliers, with Spain, Canada, and China also contributing meaningfully to import flows. The nine 10-digit tariff lines under this heading include a dedicated line (2917393000) for substances controlled under US Note 3 to Section VI, which covers precursor chemicals subject to DEA or other regulatory oversight — a classification distinction that can affect admissibility and documentation requirements.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Line 2917393000 applies to substances enumerated in US Note 3 to Section VI of the HTS, which identifies certain controlled or regulated chemical precursors. If the specific compound appears on that note's list, it must be classified there rather than in the catch-all NESOI line. Importers should cross-reference the note and consult a licensed customs broker when classifying novel or specialty aromatic acid derivatives.
Tetrabromophthalic anhydride (2917391700) is a brominated flame retardant intermediate. While it does not require a specific import permit solely by virtue of its HTS classification, importers should confirm whether the substance is subject to EPA Toxic Substances Control Act (TSCA) reporting or pre-manufacture notice requirements before entry.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| SPAIN | $8.9M | $660K | -$8.2M |
| NETHERLANDS | $3K | $5.9M | +$5.9M |
| KOREA, SOUTH | $5.7M | $208K | -$5.4M |
| MEXICO | $1.4M | $4.0M | +$2.6M |
| CANADA | $3.5M | $1.6M | -$2.0M |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2917391500 | ISOPHTHALIC ACID | $13.3M | 13.74% | $1.9M |
| 2917397000 | OTHER AROM POLYCARBOX ACIDS ETC(EXC US NOTE3 ETC) | $9.0M | 21.77% | $2.0M |
| 2917392000 | AROMAT POLYCARBOX ACID PLASTICZS AND THEIR DERIV | $5.2M | 15.89% | $56K |
| 2917390400 | 1,2,4,-BENZENETRICARBOXYLIC ACID ETC... | $789K | 37.01% | $257K |
| 2917393000 | AROM POLYCARBOX ACIDS ETC OF US NOTE 3 TO SEC 6 | $650K | 22.13% | $143K |
| 2917391200 | 4,4'-(HEXAFLUOROISOPROPYL-INDENE)PHTHALIC ANHYDRID | $320K | 0.10% | $317 |
| 2917390800 | NAPHTHALIC ANHYDRIDE | $109K | 10.00% | $11K |
ISOPHTHALIC ACID
OTHER AROM POLYCARBOX ACIDS ETC(EXC US NOTE3 ETC)
AROMAT POLYCARBOX ACID PLASTICZS AND THEIR DERIV
1,2,4,-BENZENETRICARBOXYLIC ACID ETC...
AROM POLYCARBOX ACIDS ETC OF US NOTE 3 TO SEC 6
4,4'-(HEXAFLUOROISOPROPYL-INDENE)PHTHALIC ANHYDRID
NAPHTHALIC ANHYDRIDE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2917392000 | AROMAT POLYCARBOX ACID PLASTICZS AND THEIR DERIV | $13.1M |
| 2917394000 | AROMATIC POLYCARBOXYLIC ACIDS, ETC, NESOI | $6.0M |
| 2917391500 | ISOPHTHALIC ACID (META-PHTHALIC ACID) | $469K |
AROMAT POLYCARBOX ACID PLASTICZS AND THEIR DERIV
8.6M kg
AROMATIC POLYCARBOXYLIC ACIDS, ETC, NESOI
1.9M kg
ISOPHTHALIC ACID (META-PHTHALIC ACID)
337.9K 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
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CHARLESTON, SC | $10.0M | $1.6M | -$8.4M |
| NORFOLK-NEWPORT NEWS, VA | $6.5M | $1.6M | -$4.9M |
| TEXAS CITY, TX | -- | $4.9M | +$4.9M |