Stabilized Maleic Acid for Transport from China
Maleic acid with added polymerization inhibitor (hydroquinone 50-200 ppm) per Chapter 29 note (f) for safe transport, classified under HTS 2917.19.23.00. Stabilizer prevents exothermic polymerization during shipping. Used in unsaturated polyester resin manufacturing.
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
• Include Material Safety Data Sheet (MSDS) specifying stabilizer type and concentration to qualify under Chapter 29 note (f)
• Ship at 10-40°C temperature range; provide temperature recorder data for insurance claims
• Test inhibitor levels upon Customs clearance as depletion may trigger reclassification