U.S. imports of Phthalic Anhydride (SITC 51382) totaled $5.3M in August 2026, imported from 16 countries.
Importers of Phthalic Anhydride paid $460K in duties in August 2026, an average duty rate of 8.64% — duty actually collected as a share of the imports that cleared customs, 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 dataA key aromatic intermediate produced by catalytic oxidation of ortho-xylene or naphthalene, phthalic anhydride is a primary feedstock for plasticizers, alkyd resins, and dye intermediates. Importers should note that certain foreign-origin phthalic anhydride has historically been subject to antidumping duty orders, making country-of-origin documentation critical at entry. The chemical's solid, flake, or molten form affects packaging and transport classification, and buyers in the coatings and plastics sectors should confirm specification compliance before contracting.
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90 import shipments a month
Yes, antidumping duty orders have been applied to phthalic anhydride from certain countries in the past. Importers should check the current scope of any active orders with the US Department of Commerce and confirm country-of-origin documentation to avoid unexpected duty liability.
The chemical identity remains the same regardless of physical form, so classification under this SITC heading is unaffected. However, molten shipments require specialized tank containers and may trigger additional hazardous-materials transport requirements, which importers should address in their logistics planning.
Basic heading 309 of 465 in section 5
Basic heading 51382 · $5.3M of $27.5B
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Imports · August 2026
origin
South Korea and Austria together supply 63% of it. South Korea pays 12.5% duty; Mexico 0.0%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$5.3MYoY · free account
Exports
$765KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $42.7M of Phthalic Anhydride and exported $10.4M.
Through August 2026. Source: U.S. Census Bureau.