Loading...
SITCSection 5
U.S. imports of maleic anhydride (SITC 51381) totaled $635K in April 2026, traded with 7 countries.
Importers of Maleic Anhydride paid $118K in duties in April 2026 — an effective duty rate of 19% on $635K in dutiable value, based on actual customs collections rather than the published tariff schedule. Maleic Anhydride imports of $635K in April 2026 ran 22% below the year-to-date monthly average of $810K.
Last updated: April 2026 dataMaleic anhydride is a reactive cyclic anhydride produced primarily from the catalytic oxidation of benzene or n-butane, and it serves as a foundational building block for unsaturated polyester resins (UPR) used in fiberglass-reinforced composites, as well as for alkyd resins, lubricant additives, and agricultural chemical intermediates. Global trade in maleic anhydride has been shaped by antidumping proceedings targeting imports from several major producing countries, making origin verification and trade-remedy compliance a standing concern for US buyers. Its solid flake or molten liquid forms require distinct packaging and hazmat handling protocols, and the form of shipment should be clearly declared on entry documents.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Maleic anhydride has been the subject of antidumping investigations involving imports from multiple countries. US importers should check current USITC and Commerce Department orders to determine whether active antidumping or countervailing duty orders apply to their specific supplier country, as duty deposits on covered entries can be substantial.
Yes. Maleic anhydride is shipped in solid flake form in bags or bulk containers, or as a molten liquid in heated ISO tanks. The two forms require different UN hazmat classifications, packaging groups, and temperature-control specifications. The commercial invoice and bill of lading should clearly state the physical form and concentration to ensure correct hazmat documentation and avoid port-of-entry delays.
Supplier Network
Get discovered by U.S. importers searching for HS 51381 — Maleic Anhydride. Be the first supplier listed.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| MEXICO | -- | $1.4M | +$1.4M |
| GERMANY | -- | $731K | +$731K |
| CANADA | -- | $523K | +$523K |
| COLOMBIA | -- | $486K | +$486K |
| UNITED KINGDOM | -- | $444K | +$444K |
Monthly import values over time