Isoprene with p-Menthadiene Impurities from Mexico
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 — Mexico → United States
10%
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
• 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