U.S. imports of phthalic anhydride (HS 291735) totaled $5.3M in August 2026, imported from 16 countries.
Importers of Phthalic Anhydride paid $460K in duties in August 2026, an effective tariff rate of 8.64% of the $5.3M imported — duty actually collected as a share of that value, not the published tariff schedule. Phthalic Anhydride imports of $5.3M in August 2026 ran 41% above the year-to-date monthly average of $3.8M.
Last updated: August 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.
90 shipments/mo
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.
HSChapter 29
Subheading 4 of 13 in heading 2917
Subheading 291735 · $5.3M of $95.9M
ImportsExports
Imports
$5.3MYoY · free account
Exports
$765KYoY · free account
12-mo low · imports
YoY · free accountOver the twelve months to August 2026, the U.S. imported $42.7M of Phthalic Anhydride.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
List your company under HS 291735 — Phthalic Anhydride, so the companies trading it can find you. Be the first supplier listed.
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 |
|---|---|---|---|---|---|
| 2917350000 | Phthalic Anhydride | $5.3M | 8.64% | 81.98% | $460K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2917350000 | Phthalic Anhydride | $765K |
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.
Imports · August 2026
origin
Korea, South and Austria together supply 63% of it. Korea, South pays 12.5% duty; Mexico 0.0%.
customs district
destination
entry
rate provision · imports
18.0% enters free of duty; duty collected equals 8.64% of total import value.