Phthalic Anhydride Fumaric Coproduct from Canada
Fumaric acid obtained as byproduct from phthalic anhydride production via aromatic hydrocarbon oxidation processes. Falls under 2917.19.1500 due to aromatic derivation and acyclic polycarboxylic acid structure. Used in unsaturated polyester resins and food acidulant applications.
Duty Rate — Canada → United States
16.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Include process flow diagrams showing aromatic feedstock usage in CBP documentation
• Test for trans-butenedioic acid purity (>99%) to confirm classification as fumaric acid
• Declare any residual aromatic impurities to avoid hazardous material shipping requirements