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HSChapter 29
U.S. imports of aromatic polycarboxylic acids, anhydrides & derivatives (nesoi) (HS 291739) totaled $32.2M in July 2026, traded with 19 countries.
Importers of Aromatic Polycarboxylic Acids, Anhydrides & Derivatives (NESOI) paid $4.8M in duties in July 2026 — an effective duty rate of 17% on $28.9M in dutiable value, based on actual customs collections rather than the published tariff schedule. Aromatic Polycarboxylic Acids, Anhydrides & Derivatives (NESOI) imports of $32.2M in July 2026 ran 11% above the year-to-date monthly average of $28.9M.
Last updated: July 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.
380 shipments/mo
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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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 |
|---|---|---|---|---|---|
| 2917391500 | Isophthalic Acid | $12.2M | 14.53% | 108.18% | $1.8M |
| 2917397000 | Other Arom Polycarbox Acids Etc(Exc US Note3 Etc) | $8.3M | 19.59% | 101.41% | $1.6M |
| 2917392000 | Aromat Polycarbox Acid Plasticzs and Their Deriv | $7.6M | 4.41% | 42.44% | $333K |
| 2917390400 | 1,2,4,-Benzenetricarboxylic Acid Etc... | $3.3M | 28.83% | 97.69% | $947K |
| 2917393000 | Arom Polycarbox Acids Etc of US Note 3 to Sec 6 | $437K | 13.35% | 99.05% | $58K |
| 2917390800 | Naphthalic Anhydride | $237K | 10.00% | 100.00% | $24K |
| 2917391200 | 4,4'-(Hexafluoroisopropyl-Indene)Phthalic Anhydrid | $149K | 0.00% | 100.00% | -- |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2917394000 | Aromatic Polycarboxylic Acids, Etc, NESOI | $6.4M |
| 2917392000 | Aromat Polycarbox Acid Plasticzs and Their Deriv | $4.5M |
| 2917391500 | Isophthalic Acid (Meta-Phthalic Acid) | $894K |
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
$32.2MYoY · Pro
Exports
$11.8MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Spain and Korea, South together supply 51% of it.
customs district
destination
entry
rate provision · imports
14.0% enters free of duty; the effective duty rate is 14.80%.