Maleic Acid for Unsaturated Polyester Resins from China
High-reactivity maleic acid specifically produced for unsaturated polyester resin (UPR) manufacture, classified under HTS 2917.19.23.00. Optimized color (APHA <20) and acid number (390-410 mg KOH/g). Essential raw material for composites and gelcoats.
Duty Rate — China → United States
41.5%
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
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Specify Gardner color scale and APHA color values in COA for resin manufacturers
• Use nitrogen-blanketed storage to prevent oxidation during transshipment
• Verify ortho-phthalic acid ratio compatibility for specific resin formulations