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HSChapter 29
U.S. imports of phthalic anhydride (HS 291735) totaled $4.6M in May 2026, traded with 12 countries.
Importers of Phthalic Anhydride paid $471K in duties in May 2026 — an effective duty rate of 11% on $4.1M in dutiable value, based on actual customs collections rather than the published tariff schedule. Phthalic Anhydride imports of $4.6M in May 2026 ran 63% above the year-to-date monthly average of $2.9M.
Last updated: May 2026 dataPhthalic anhydride is a foundational aromatic intermediate for alkyd resins, unsaturated polyester resins, and phthalate plasticizer synthesis, and its import volume tracks closely with domestic resin and coatings production cycles. South Korea is the leading US supplier, followed by Mexico and Israel — a geographically diverse top-three that reflects multiple regional production hubs. All imports enter under a single 10-digit line (2917350000), simplifying classification but placing full emphasis on origin documentation for trade-remedy compliance. Importers should monitor antidumping and countervailing duty proceedings, as phthalic anhydride has been subject to trade-remedy actions from various origins historically.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The largest end uses are alkyd resin production for paints and coatings, unsaturated polyester resins for composites and construction materials, and as a feedstock for phthalate plasticizer manufacturing. Demand therefore correlates with construction activity, automotive production, and coatings industry output cycles.
Phthalic anhydride has been the subject of antidumping proceedings from various origins in the past. Importers should check current US Department of Commerce and ITC records for any active orders or suspension agreements before contracting, as duty liability can be significant and may apply retroactively from the petition date.
Monthly import values over time
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2917350000 | PHTHALIC ANHYDRIDE | $2.4M | 10.49% | $249K |
PHTHALIC ANHYDRIDE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2917350000 | PHTHALIC ANHYDRIDE | $806K |
PHTHALIC ANHYDRIDE
679.7K 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
| Country | Imports | Exports | Balance |
|---|---|---|---|
| KOREA, SOUTH | $2.6M | -- | -$2.6M |
| MEXICO | $507K | $529K | +$22K |
| AUSTRIA | $708K | -- | -$708K |
| ISRAEL | $625K | -- | -$625K |
| CANADA | -- | $240K | +$240K |
| State | Imports | Exports | Balance |
|---|---|---|---|
| New Jersey | $1.0M | -- | -$1.0M |
| Louisiana | -- | $496K | +$496K |
| Ohio | $452K | $6K | -$446K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NEWARK, NJ | $1.9M | -- | -$1.9M |
| LAREDO, TX | -- | $529K | +$529K |
| LOS ANGELES, CA | $264K | -- | -$264K |