Isoprene with p-Menthadiene Impurities from China
Commercial isoprene containing controlled p-menthadiene impurities from thermal dimerization limits. Still classified as principal isoprene compound per Chapter 29 classification rules. 'Other' category accommodates typical commercial impurity profiles.
Duty Rate — China → United States
37.5%
Rate breakdown
9903.05.3112.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of China, as provided for in U.S. note 52 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 impurity limits in COA (p-menthadiene typically <2%); higher levels risk reclassification
• Monitor for auto-polymerization; temperature-controlled shipping prevents solid 'popcorn polymer' formation
• Customs may request comparative pricing data vs pure monomer to verify commercial grade status